/*
 * Prototype JavaScript framework, version 1.6.0.2 (c) 2005-2008 Sam Stephenson
 * Prototype is freely distributable under the terms of an MIT-style license.
 * For details, see the Prototype web site: http://www.prototypejs.org/
 * --------------------------------------------------------------------------
 */
var Prototype = {
    Version : '1.6.0.2',
    Browser : {
        IE : !!(window.attachEvent && !window.opera),
        Opera : !!window.opera,
        WebKit : navigator.userAgent.indexOf('AppleWebKit/') > -1,
        Gecko : navigator.userAgent.indexOf('Gecko') > -1
                && navigator.userAgent.indexOf('KHTML') == -1,
        MobileSafari : !!navigator.userAgent.match(/Apple.*Mobile.*Safari/)
    },
    BrowserFeatures : {
        XPath : !!document.evaluate,
        ElementExtensions : !!window.HTMLElement,
        SpecificElementExtensions : document.createElement('div').__proto__
                && document.createElement('div').__proto__ !== document
                        .createElement('form').__proto__
    },
    ScriptFragment : '<script[^>]*>([\\S\\s]*?)<\/script>',
    JSONFilter : /^\/\*-secure-([\s\S]*)\*\/\s*$/,
    emptyFunction : function() {
    },
    K : function(x) {
	    return x
    }
};
if (Prototype.Browser.MobileSafari)
	Prototype.BrowserFeatures.SpecificElementExtensions = false;
var Class = {
	create : function() {
		var parent = null, properties = $A(arguments);
		if (Object.isFunction(properties[0]))
			parent = properties.shift();
		function klass() {
			this.initialize.apply(this, arguments);
		}
		Object.extend(klass, Class.Methods);
		klass.superclass = parent;
		klass.subclasses = [];
		if (parent) {
			var subclass = function() {
			};
			subclass.prototype = parent.prototype;
			klass.prototype = new subclass;
			parent.subclasses.push(klass);
		}
		for ( var i = 0; i < properties.length; i++)
			klass.addMethods(properties[i]);
		if (!klass.prototype.initialize)
			klass.prototype.initialize = Prototype.emptyFunction;
		klass.prototype.constructor = klass;
		return klass;
	}
};
Class.Methods = {
	addMethods : function(source) {
		var ancestor = this.superclass && this.superclass.prototype;
		var properties = Object.keys(source);
		if (!Object.keys( {
			toString : true
		}).length)
			properties.push("toString", "valueOf");
		for ( var i = 0, length = properties.length; i < length; i++) {
			var property = properties[i], value = source[property];
			if (ancestor && Object.isFunction(value)
			        && value.argumentNames().first() == "$super") {
				var method = value, value = Object.extend((function(m) {
					return function() {
						return ancestor[m].apply(this, arguments)
					};
				})(property).wrap(method), {
				    valueOf : function() {
					    return method
				    },
				    toString : function() {
					    return method.toString()
				    }
				});
			}
			this.prototype[property] = value;
		}
		return this;
	}
};
var Abstract = {};
Object.extend = function(destination, source) {
	for ( var property in source)
		destination[property] = source[property];
	return destination;
};
Object.extend(Object, {
    inspect : function(object) {
	    try {
		    if (Object.isUndefined(object))
			    return 'undefined';
		    if (object === null)
			    return 'null';
		    return object.inspect ? object.inspect() : String(object);
	    } catch (e) {
		    if (e instanceof RangeError)
			    return '...';
		    throw e;
	    }
    },
    toJSON : function(object) {
	    var type = typeof object;
	    switch (type) {
		    case 'undefined':
		    case 'function':
		    case 'unknown':
			    return;
		    case 'boolean':
			    return object.toString();
	    }
	    if (object === null)
		    return 'null';
	    if (object.toJSON)
		    return object.toJSON();
	    if (Object.isElement(object))
		    return;
	    var results = [];
	    for ( var property in object) {
		    var value = Object.toJSON(object[property]);
		    if (!Object.isUndefined(value))
			    results.push(property.toJSON() + ': ' + value);
	    }
	    return '{' + results.join(', ') + '}';
    },
    toQueryString : function(object) {
	    return $H(object).toQueryString();
    },
    toHTML : function(object) {
	    return object && object.toHTML ? object.toHTML() : String
	            .interpret(object);
    },
    keys : function(object) {
	    var keys = [];
	    for ( var property in object)
		    keys.push(property);
	    return keys;
    },
    values : function(object) {
	    var values = [];
	    for ( var property in object)
		    values.push(object[property]);
	    return values;
    },
    clone : function(object) {
	    return Object.extend( {}, object);
    },
    isElement : function(object) {
	    return object && object.nodeType == 1;
    },
    isArray : function(object) {
	    return object != null && typeof object == "object"
	            && 'splice' in object && 'join' in object;
    },
    isHash : function(object) {
	    return object instanceof Hash;
    },
    isFunction : function(object) {
	    return typeof object == "function";
    },
    isString : function(object) {
	    return typeof object == "string";
    },
    isNumber : function(object) {
	    return typeof object == "number";
    },
    isUndefined : function(object) {
	    return typeof object == "undefined";
    }
});
Object.extend(Function.prototype,
        {
            argumentNames : function() {
	            var names = this.toString().match(
	                    /^[\s\(]*function[^(]*\((.*?)\)/)[1].split(",").invoke(
	                    "strip");
	            return names.length == 1 && !names[0] ? [] : names;
            },
            bind : function() {
	            if (arguments.length < 2 && Object.isUndefined(arguments[0]))
		            return this;
	            var __method = this, args = $A(arguments), object = args
	                    .shift();
	            return function() {
		            return __method.apply(object, args.concat($A(arguments)));
	            }
            },
            bindAsEventListener : function() {
	            var __method = this, args = $A(arguments), object = args
	                    .shift();
	            return function(event) {
		            return __method.apply(object, [
			            event || window.event
		            ].concat(args));
	            }
            },
            curry : function() {
	            if (!arguments.length)
		            return this;
	            var __method = this, args = $A(arguments);
	            return function() {
		            return __method.apply(this, args.concat($A(arguments)));
	            }
            },
            delay : function() {
	            var __method = this, args = $A(arguments), timeout = args
	                    .shift() * 1000;
	            return window.setTimeout(function() {
		            return __method.apply(__method, args);
	            }, timeout);
            },
            wrap : function(wrapper) {
	            var __method = this;
	            return function() {
		            return wrapper.apply(this, [
			            __method.bind(this)
		            ].concat($A(arguments)));
	            }
            },
            methodize : function() {
	            if (this._methodized)
		            return this._methodized;
	            var __method = this;
	            return this._methodized = function() {
		            return __method.apply(null, [
			            this
		            ].concat($A(arguments)));
	            };
            }
        });
Function.prototype.defer = Function.prototype.delay.curry(0.01);
Date.prototype.toJSON = function() {
	return '"' + this.getUTCFullYear() + '-'
	        + (this.getUTCMonth() + 1).toPaddedString(2) + '-'
	        + this.getUTCDate().toPaddedString(2) + 'T'
	        + this.getUTCHours().toPaddedString(2) + ':'
	        + this.getUTCMinutes().toPaddedString(2) + ':'
	        + this.getUTCSeconds().toPaddedString(2) + 'Z"';
};
var Try = {
	these : function() {
		var returnValue;
		for ( var i = 0, length = arguments.length; i < length; i++) {
			var lambda = arguments[i];
			try {
				returnValue = lambda();
				break;
			} catch (e) {
			}
		}
		return returnValue;
	}
};
RegExp.prototype.match = RegExp.prototype.test;
RegExp.escape = function(str) {
	return String(str).replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
};
var PeriodicalExecuter = Class.create( {
    initialize : function(callback, frequency) {
	    this.callback = callback;
	    this.frequency = frequency;
	    this.currentlyExecuting = false;
	    this.registerCallback();
    },
    registerCallback : function() {
	    this.timer = setInterval(this.onTimerEvent.bind(this),
	            this.frequency * 1000);
    },
    execute : function() {
	    this.callback(this);
    },
    stop : function() {
	    if (!this.timer)
		    return;
	    clearInterval(this.timer);
	    this.timer = null;
    },
    onTimerEvent : function() {
	    if (!this.currentlyExecuting) {
		    try {
			    this.currentlyExecuting = true;
			    this.execute();
		    } finally {
			    this.currentlyExecuting = false;
		    }
	    }
    }
});
Object.extend(String, {
    interpret : function(value) {
	    return value == null ? '' : String(value);
    },
    specialChar : {
        '\b' : '\\b',
        '\t' : '\\t',
        '\n' : '\\n',
        '\f' : '\\f',
        '\r' : '\\r',
        '\\' : '\\\\'
    }
});
Object.extend(String.prototype, {
    gsub : function(pattern, replacement) {
	    var result = '', source = this, match;
	    replacement = arguments.callee.prepareReplacement(replacement);
	    while (source.length > 0) {
		    if (match = source.match(pattern)) {
			    result += source.slice(0, match.index);
			    result += String.interpret(replacement(match));
			    source = source.slice(match.index + match[0].length);
		    } else {
			    result += source, source = '';
		    }
	    }
	    return result;
    },
    sub : function(pattern, replacement, count) {
	    replacement = this.gsub.prepareReplacement(replacement);
	    count = Object.isUndefined(count) ? 1 : count;
	    return this.gsub(pattern, function(match) {
		    if (--count < 0)
			    return match[0];
		    return replacement(match);
	    });
    },
    scan : function(pattern, iterator) {
	    this.gsub(pattern, iterator);
	    return String(this);
    },
    truncate : function(length, truncation) {
	    length = length || 30;
	    truncation = Object.isUndefined(truncation) ? '...' : truncation;
	    return this.length > length ? this.slice(0, length - truncation.length)
	            + truncation : String(this);
    },
    strip : function() {
	    return this.replace(/^\s+/, '').replace(/\s+$/, '');
    },
    stripTags : function() {
	    return this.replace(/<\/?[^>]+>/gi, '');
    },
    stripScripts : function() {
	    return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
    },
    extractScripts : function() {
	    var matchAll = new RegExp(Prototype.ScriptFragment, 'img');
	    var matchOne = new RegExp(Prototype.ScriptFragment, 'im');
	    return (this.match(matchAll) || []).map(function(scriptTag) {
		    return (scriptTag.match(matchOne) || [
		            '', ''
		    ])[1];
	    });
    },
    evalScripts : function() {
	    return this.extractScripts().map(function(script) {
		    return eval(script)
	    });
    },
    escapeHTML : function() {
	    var self = arguments.callee;
	    self.text.data = this;
	    return self.div.innerHTML;
    },
    unescapeHTML : function() {
	    var div = new Element('div');
	    div.innerHTML = this.stripTags();
	    return div.childNodes[0] ? (div.childNodes.length > 1 ? $A(
	            div.childNodes).inject('', function(memo, node) {
		    return memo + node.nodeValue
	    }) : div.childNodes[0].nodeValue) : '';
    },
    toQueryParams : function(separator) {
	    var match = this.strip().match(/([^?#]*)(#.*)?$/);
	    if (!match)
		    return {};
	    return match[1].split(separator || '&').inject( {},
	            function(hash, pair) {
		            if ((pair = pair.split('='))[0]) {
			            var key = decodeURIComponent(pair.shift());
			            var value = pair.length > 1 ? pair.join('=') : pair[0];
			            if (value != undefined)
				            value = decodeURIComponent(value);
			            if (key in hash) {
				            if (!Object.isArray(hash[key]))
					            hash[key] = [
						            hash[key]
					            ];
				            hash[key].push(value);
			            } else
				            hash[key] = value;
		            }
		            return hash;
	            });
    },
    toArray : function() {
	    return this.split('');
    },
    succ : function() {
	    return this.slice(0, this.length - 1)
	            + String.fromCharCode(this.charCodeAt(this.length - 1) + 1);
    },
    times : function(count) {
	    return count < 1 ? '' : new Array(count + 1).join(this);
    },
    camelize : function() {
	    var parts = this.split('-'), len = parts.length;
	    if (len == 1)
		    return parts[0];
	    var camelized = this.charAt(0) == '-' ? parts[0].charAt(0)
	            .toUpperCase()
	            + parts[0].substring(1) : parts[0];
	    for ( var i = 1; i < len; i++)
		    camelized += parts[i].charAt(0).toUpperCase()
		            + parts[i].substring(1);
	    return camelized;
    },
    capitalize : function() {
	    return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
    },
    underscore : function() {
	    return this.gsub(/::/, '/').gsub(/([A-Z]+)([A-Z][a-z])/, '#{1}_#{2}')
	            .gsub(/([a-z\d])([A-Z])/, '#{1}_#{2}').gsub(/-/, '_')
	            .toLowerCase();
    },
    dasherize : function() {
	    return this.gsub(/_/, '-');
    },
    inspect : function(useDoubleQuotes) {
	    var escapedString = this.gsub(/[\x00-\x1f\\]/, function(match) {
		    var character = String.specialChar[match[0]];
		    return character ? character : '\\u00' + match[0].charCodeAt()
		            .toPaddedString(2, 16);
	    });
	    if (useDoubleQuotes)
		    return '"' + escapedString.replace(/"/g, '\\"') + '"';
	    return "'" + escapedString.replace(/'/g, '\\\'') + "'";
    },
    toJSON : function() {
	    return this.inspect(true);
    },
    unfilterJSON : function(filter) {
	    return this.sub(filter || Prototype.JSONFilter, '#{1}');
    },
    isJSON : function() {
	    var str = this;
	    if (str.blank())
		    return false;
	    str = this.replace(/\\./g, '@').replace(/"[^"\\\n\r]*"/g, '');
	    return (/^[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]*$/).test(str);
    },
    evalJSON : function(sanitize) {
	    var json = this.unfilterJSON();
	    try {
		    if (!sanitize || json.isJSON())
			    return eval('(' + json + ')');
	    } catch (e) {
	    }
	    throw new SyntaxError('Badly formed JSON string: ' + this.inspect());
    },
    include : function(pattern) {
	    return this.indexOf(pattern) > -1;
    },
    startsWith : function(pattern) {
	    return this.indexOf(pattern) === 0;
    },
    endsWith : function(pattern) {
	    var d = this.length - pattern.length;
	    return d >= 0 && this.lastIndexOf(pattern) === d;
    },
    empty : function() {
	    return this == '';
    },
    blank : function() {
	    return /^\s*$/.test(this);
    },
    interpolate : function(object, pattern) {
	    return new Template(this, pattern).evaluate(object);
    }
});
if (Prototype.Browser.WebKit || Prototype.Browser.IE)
	Object.extend(String.prototype, {
	    escapeHTML : function() {
		    return this.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(
		            />/g, '&gt;');
	    },
	    unescapeHTML : function() {
		    return this.replace(/&amp;/g, '&').replace(/&lt;/g, '<').replace(
		            /&gt;/g, '>');
	    }
	});
String.prototype.gsub.prepareReplacement = function(replacement) {
	if (Object.isFunction(replacement))
		return replacement;
	var template = new Template(replacement);
	return function(match) {
		return template.evaluate(match)
	};
};
String.prototype.parseQuery = String.prototype.toQueryParams;
Object.extend(String.prototype.escapeHTML, {
    div : document.createElement('div'),
    text : document.createTextNode('')
});
with (String.prototype.escapeHTML)
	div.appendChild(text);
var Template = Class.create( {
    initialize : function(template, pattern) {
	    this.template = template.toString();
	    this.pattern = pattern || Template.Pattern;
    },
    evaluate : function(object) {
	    if (Object.isFunction(object.toTemplateReplacements))
		    object = object.toTemplateReplacements();
	    return this.template.gsub(this.pattern, function(match) {
		    if (object == null)
			    return '';
		    var before = match[1] || '';
		    if (before == '\\')
			    return match[2];
		    var ctx = object, expr = match[3];
		    var pattern = /^([^.[]+|\[((?:.*?[^\\])?)\])(\.|\[|$)/;
		    match = pattern.exec(expr);
		    if (match == null)
			    return before;
		    while (match != null) {
			    var comp = match[1].startsWith('[') ? match[2].gsub('\\\\]',
			            ']') : match[1];
			    ctx = ctx[comp];
			    if (null == ctx || '' == match[3])
				    break;
			    expr = expr.substring('[' == match[3] ? match[1].length
			            : match[0].length);
			    match = pattern.exec(expr);
		    }
		    return before + String.interpret(ctx);
	    });
    }
});
Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;
var $break = {};
var Enumerable = {
    each : function(iterator, context) {
	    var index = 0;
	    iterator = iterator.bind(context);
	    try {
		    this._each(function(value) {
			    iterator(value, index++);
		    });
	    } catch (e) {
		    if (e != $break)
			    throw e;
	    }
	    return this;
    },
    eachSlice : function(number, iterator, context) {
	    iterator = iterator ? iterator.bind(context) : Prototype.K;
	    var index = -number, slices = [], array = this.toArray();
	    while ((index += number) < array.length)
		    slices.push(array.slice(index, index + number));
	    return slices.collect(iterator, context);
    },
    all : function(iterator, context) {
	    iterator = iterator ? iterator.bind(context) : Prototype.K;
	    var result = true;
	    this.each(function(value, index) {
		    result = result && !!iterator(value, index);
		    if (!result)
			    throw $break;
	    });
	    return result;
    },
    any : function(iterator, context) {
	    iterator = iterator ? iterator.bind(context) : Prototype.K;
	    var result = false;
	    this.each(function(value, index) {
		    if (result = !!iterator(value, index))
			    throw $break;
	    });
	    return result;
    },
    collect : function(iterator, context) {
	    iterator = iterator ? iterator.bind(context) : Prototype.K;
	    var results = [];
	    this.each(function(value, index) {
		    results.push(iterator(value, index));
	    });
	    return results;
    },
    detect : function(iterator, context) {
	    iterator = iterator.bind(context);
	    var result;
	    this.each(function(value, index) {
		    if (iterator(value, index)) {
			    result = value;
			    throw $break;
		    }
	    });
	    return result;
    },
    findAll : function(iterator, context) {
	    iterator = iterator.bind(context);
	    var results = [];
	    this.each(function(value, index) {
		    if (iterator(value, index))
			    results.push(value);
	    });
	    return results;
    },
    grep : function(filter, iterator, context) {
	    iterator = iterator ? iterator.bind(context) : Prototype.K;
	    var results = [];
	    if (Object.isString(filter))
		    filter = new RegExp(filter);
	    this.each(function(value, index) {
		    if (filter.match(value))
			    results.push(iterator(value, index));
	    });
	    return results;
    },
    include : function(object) {
	    if (Object.isFunction(this.indexOf))
		    if (this.indexOf(object) != -1)
			    return true;
	    var found = false;
	    this.each(function(value) {
		    if (value == object) {
			    found = true;
			    throw $break;
		    }
	    });
	    return found;
    },
    inGroupsOf : function(number, fillWith) {
	    fillWith = Object.isUndefined(fillWith) ? null : fillWith;
	    return this.eachSlice(number, function(slice) {
		    while (slice.length < number)
			    slice.push(fillWith);
		    return slice;
	    });
    },
    inject : function(memo, iterator, context) {
	    iterator = iterator.bind(context);
	    this.each(function(value, index) {
		    memo = iterator(memo, value, index);
	    });
	    return memo;
    },
    invoke : function(method) {
	    var args = $A(arguments).slice(1);
	    return this.map(function(value) {
		    return value[method].apply(value, args);
	    });
    },
    max : function(iterator, context) {
	    iterator = iterator ? iterator.bind(context) : Prototype.K;
	    var result;
	    this.each(function(value, index) {
		    value = iterator(value, index);
		    if (result == null || value >= result)
			    result = value;
	    });
	    return result;
    },
    min : function(iterator, context) {
	    iterator = iterator ? iterator.bind(context) : Prototype.K;
	    var result;
	    this.each(function(value, index) {
		    value = iterator(value, index);
		    if (result == null || value < result)
			    result = value;
	    });
	    return result;
    },
    partition : function(iterator, context) {
	    iterator = iterator ? iterator.bind(context) : Prototype.K;
	    var trues = [], falses = [];
	    this.each(function(value, index) {
		    (iterator(value, index) ? trues : falses).push(value);
	    });
	    return [
	            trues, falses
	    ];
    },
    pluck : function(property) {
	    var results = [];
	    this.each(function(value) {
		    results.push(value[property]);
	    });
	    return results;
    },
    reject : function(iterator, context) {
	    iterator = iterator.bind(context);
	    var results = [];
	    this.each(function(value, index) {
		    if (!iterator(value, index))
			    results.push(value);
	    });
	    return results;
    },
    sortBy : function(iterator, context) {
	    iterator = iterator.bind(context);
	    return this.map(function(value, index) {
		    return {
		        value : value,
		        criteria : iterator(value, index)
		    };
	    }).sort(function(left, right) {
		    var a = left.criteria, b = right.criteria;
		    return a < b ? -1 : a > b ? 1 : 0;
	    }).pluck('value');
    },
    toArray : function() {
	    return this.map();
    },
    zip : function() {
	    var iterator = Prototype.K, args = $A(arguments);
	    if (Object.isFunction(args.last()))
		    iterator = args.pop();
	    var collections = [
		    this
	    ].concat(args).map($A);
	    return this.map(function(value, index) {
		    return iterator(collections.pluck(index));
	    });
    },
    size : function() {
	    return this.toArray().length;
    },
    inspect : function() {
	    return '#<Enumerable:' + this.toArray().inspect() + '>';
    }
};
Object.extend(Enumerable, {
    map : Enumerable.collect,
    find : Enumerable.detect,
    select : Enumerable.findAll,
    filter : Enumerable.findAll,
    member : Enumerable.include,
    entries : Enumerable.toArray,
    every : Enumerable.all,
    some : Enumerable.any
});
function $A(iterable) {
	if (!iterable)
		return [];
	if (iterable.toArray)
		return iterable.toArray();
	var length = iterable.length || 0, results = new Array(length);
	while (length--)
		results[length] = iterable[length];
	return results;
}
if (Prototype.Browser.WebKit) {
	$A = function(iterable) {
		if (!iterable)
			return [];
		if (!(Object.isFunction(iterable) && iterable == '[object NodeList]')
		        && iterable.toArray)
			return iterable.toArray();
		var length = iterable.length || 0, results = new Array(length);
		while (length--)
			results[length] = iterable[length];
		return results;
	};
}
Array.from = $A;
Object.extend(Array.prototype, Enumerable);
if (!Array.prototype._reverse)
	Array.prototype._reverse = Array.prototype.reverse;
Object.extend(Array.prototype, {
    _each : function(iterator) {
	    for ( var i = 0, length = this.length; i < length; i++)
		    iterator(this[i]);
    },
    clear : function() {
	    this.length = 0;
	    return this;
    },
    first : function() {
	    return this[0];
    },
    last : function() {
	    return this[this.length - 1];
    },
    compact : function() {
	    return this.select(function(value) {
		    return value != null;
	    });
    },
    flatten : function() {
	    return this.inject( [], function(array, value) {
		    return array.concat(Object.isArray(value) ? value.flatten() : [
			    value
		    ]);
	    });
    },
    without : function() {
	    var values = $A(arguments);
	    return this.select(function(value) {
		    return !values.include(value);
	    });
    },
    reverse : function(inline) {
	    return (inline !== false ? this : this.toArray())._reverse();
    },
    reduce : function() {
	    return this.length > 1 ? this : this[0];
    },
    uniq : function(sorted) {
	    return this.inject( [],
	            function(array, value, index) {
		            if (0 == index
		                    || (sorted ? array.last() != value : !array
		                            .include(value)))
			            array.push(value);
		            return array;
	            });
    },
    intersect : function(array) {
	    return this.uniq().findAll(function(item) {
		    return array.detect(function(value) {
			    return item === value
		    });
	    });
    },
    clone : function() {
	    return [].concat(this);
    },
    size : function() {
	    return this.length;
    },
    inspect : function() {
	    return '[' + this.map(Object.inspect).join(', ') + ']';
    },
    toJSON : function() {
	    var results = [];
	    this.each(function(object) {
		    var value = Object.toJSON(object);
		    if (!Object.isUndefined(value))
			    results.push(value);
	    });
	    return '[' + results.join(', ') + ']';
    }
});
if (Object.isFunction(Array.prototype.forEach))
	Array.prototype._each = Array.prototype.forEach;
if (!Array.prototype.indexOf)
	Array.prototype.indexOf = function(item, i) {
		i || (i = 0);
		var length = this.length;
		if (i < 0)
			i = length + i;
		for (; i < length; i++)
			if (this[i] === item)
				return i;
		return -1;
	};
if (!Array.prototype.lastIndexOf)
	Array.prototype.lastIndexOf = function(item, i) {
		i = isNaN(i) ? this.length : (i < 0 ? this.length + i : i) + 1;
		var n = this.slice(0, i).reverse().indexOf(item);
		return (n < 0) ? n : i - n - 1;
	};
Array.prototype.toArray = Array.prototype.clone;
function $w(string) {
	if (!Object.isString(string))
		return [];
	string = string.strip();
	return string ? string.split(/\s+/) : [];
}
if (Prototype.Browser.Opera) {
	Array.prototype.concat = function() {
		var array = [];
		for ( var i = 0, length = this.length; i < length; i++)
			array.push(this[i]);
		for ( var i = 0, length = arguments.length; i < length; i++) {
			if (Object.isArray(arguments[i])) {
				for ( var j = 0, arrayLength = arguments[i].length; j < arrayLength; j++)
					array.push(arguments[i][j]);
			} else {
				array.push(arguments[i]);
			}
		}
		return array;
	};
}
Object.extend(Number.prototype, {
    toColorPart : function() {
	    return this.toPaddedString(2, 16);
    },
    succ : function() {
	    return this + 1;
    },
    times : function(iterator) {
	    $R(0, this, true).each(iterator);
	    return this;
    },
    toPaddedString : function(length, radix) {
	    var string = this.toString(radix || 10);
	    return '0'.times(length - string.length) + string;
    },
    toJSON : function() {
	    return isFinite(this) ? this.toString() : 'null';
    }
});
$w('abs round ceil floor').each(function(method) {
	Number.prototype[method] = Math[method].methodize();
});
function $H(object) {
	return new Hash(object);
};
var Hash = Class.create(Enumerable, (function() {
	function toQueryPair(key, value) {
		if (Object.isUndefined(value))
			return key;
		return key + '=' + encodeURIComponent(String.interpret(value));
	}
	return {
	    initialize : function(object) {
		    this._object = Object.isHash(object) ? object.toObject() : Object
		            .clone(object);
	    },
	    _each : function(iterator) {
		    for ( var key in this._object) {
			    var value = this._object[key], pair = [
			            key, value
			    ];
			    pair.key = key;
			    pair.value = value;
			    iterator(pair);
		    }
	    },
	    set : function(key, value) {
		    return this._object[key] = value;
	    },
	    get : function(key) {
		    return this._object[key];
	    },
	    unset : function(key) {
		    var value = this._object[key];
		    delete this._object[key];
		    return value;
	    },
	    toObject : function() {
		    return Object.clone(this._object);
	    },
	    keys : function() {
		    return this.pluck('key');
	    },
	    values : function() {
		    return this.pluck('value');
	    },
	    index : function(value) {
		    var match = this.detect(function(pair) {
			    return pair.value === value;
		    });
		    return match && match.key;
	    },
	    merge : function(object) {
		    return this.clone().update(object);
	    },
	    update : function(object) {
		    return new Hash(object).inject(this, function(result, pair) {
			    result.set(pair.key, pair.value);
			    return result;
		    });
	    },
	    toQueryString : function() {
		    return this.map(function(pair) {
			    var key = encodeURIComponent(pair.key), values = pair.value;
			    if (values && typeof values == 'object') {
				    if (Object.isArray(values))
					    return values.map(toQueryPair.curry(key)).join('&');
			    }
			    return toQueryPair(key, values);
		    }).join('&');
	    },
	    inspect : function() {
		    return '#<Hash:{' + this.map(function(pair) {
			    return pair.map(Object.inspect).join(': ');
		    }).join(', ') + '}>';
	    },
	    toJSON : function() {
		    return Object.toJSON(this.toObject());
	    },
	    clone : function() {
		    return new Hash(this);
	    }
	}
})());
Hash.prototype.toTemplateReplacements = Hash.prototype.toObject;
Hash.from = $H;
var ObjectRange = Class.create(Enumerable, {
    initialize : function(start, end, exclusive) {
	    this.start = start;
	    this.end = end;
	    this.exclusive = exclusive;
    },
    _each : function(iterator) {
	    var value = this.start;
	    while (this.include(value)) {
		    iterator(value);
		    value = value.succ();
	    }
    },
    include : function(value) {
	    if (value < this.start)
		    return false;
	    if (this.exclusive)
		    return value < this.end;
	    return value <= this.end;
    }
});
var $R = function(start, end, exclusive) {
	return new ObjectRange(start, end, exclusive);
};
var Ajax = {
    getTransport : function() {
	    return Try.these(function() {
		    return new XMLHttpRequest()
	    }, function() {
		    return new ActiveXObject('Msxml2.XMLHTTP')
	    }, function() {
		    return new ActiveXObject('Microsoft.XMLHTTP')
	    }) || false;
    },
    activeRequestCount : 0
};
Ajax.Responders = {
    responders : [],
    _each : function(iterator) {
	    this.responders._each(iterator);
    },
    register : function(responder) {
	    if (!this.include(responder))
		    this.responders.push(responder);
    },
    unregister : function(responder) {
	    this.responders = this.responders.without(responder);
    },
    dispatch : function(callback, request, transport, json) {
	    this.each(function(responder) {
		    if (Object.isFunction(responder[callback])) {
			    try {
				    responder[callback].apply(responder, [
				            request, transport, json
				    ]);
			    } catch (e) {
			    }
		    }
	    });
    }
};
Object.extend(Ajax.Responders, Enumerable);
Ajax.Responders.register( {
    onCreate : function() {
	    Ajax.activeRequestCount++
    },
    onComplete : function() {
	    Ajax.activeRequestCount--
    }
});
Ajax.Base = Class.create( {
	initialize : function(options) {
		this.options = {
		    method : 'post',
		    asynchronous : true,
		    contentType : 'application/x-www-form-urlencoded',
		    encoding : 'UTF-8',
		    parameters : '',
		    evalJSON : true,
		    evalJS : true
		};
		Object.extend(this.options, options || {});
		this.options.method = this.options.method.toLowerCase();
		if (Object.isString(this.options.parameters))
			this.options.parameters = this.options.parameters.toQueryParams();
		else if (Object.isHash(this.options.parameters))
			this.options.parameters = this.options.parameters.toObject();
	}
});
Ajax.Request = Class
        .create(
                Ajax.Base,
                {
                    _complete : false,
                    initialize : function($super, url, options) {
	                    $super(options);
	                    this.transport = Ajax.getTransport();
	                    this.request(url);
                    },
                    request : function(url) {
	                    this.url = url;
	                    this.method = this.options.method;
	                    var params = Object.clone(this.options.parameters);
	                    if (! [
	                            'get', 'post'
	                    ].include(this.method)) {
		                    params['_method'] = this.method;
		                    this.method = 'post';
	                    }
	                    this.parameters = params;
	                    if (params = Object.toQueryString(params)) {
		                    if (this.method == 'get')
			                    this.url += (this.url.include('?') ? '&' : '?')
			                            + params;
		                    else if (/Konqueror|Safari|KHTML/
		                            .test(navigator.userAgent))
			                    params += '&_=';
	                    }
	                    try {
		                    var response = new Ajax.Response(this);
		                    if (this.options.onCreate)
			                    this.options.onCreate(response);
		                    Ajax.Responders
		                            .dispatch('onCreate', this, response);
		                    this.transport.open(this.method.toUpperCase(),
		                            this.url, this.options.asynchronous);
		                    if (this.options.asynchronous)
			                    this.respondToReadyState.bind(this).defer(1);
		                    this.transport.onreadystatechange = this.onStateChange
		                            .bind(this);
		                    this.setRequestHeaders();
		                    this.body = this.method == 'post' ? (this.options.postBody || params)
		                            : null;
		                    this.transport.send(this.body);
		                    if (!this.options.asynchronous
		                            && this.transport.overrideMimeType)
			                    this.onStateChange();
	                    } catch (e) {
		                    this.dispatchException(e);
	                    }
                    },
                    onStateChange : function() {
	                    var readyState = this.transport.readyState;
	                    if (readyState > 1
	                            && !((readyState == 4) && this._complete))
		                    this.respondToReadyState(this.transport.readyState);
                    },
                    setRequestHeaders : function() {
	                    var headers = {
	                        'X-Requested-With' : 'XMLHttpRequest',
	                        'X-Prototype-Version' : Prototype.Version,
	                        'Accept' : 'text/javascript, text/html, application/xml, text/xml, */*'
	                    };
	                    if (this.method == 'post') {
		                    headers['Content-type'] = this.options.contentType
		                            + (this.options.encoding ? '; charset=' + this.options.encoding
		                                    : '');
		                    if (this.transport.overrideMimeType
		                            && (navigator.userAgent
		                                    .match(/Gecko\/(\d{4})/) || [
		                                    0, 2005
		                            ])[1] < 2005)
			                    headers['Connection'] = 'close';
	                    }
	                    if (typeof this.options.requestHeaders == 'object') {
		                    var extras = this.options.requestHeaders;
		                    if (Object.isFunction(extras.push))
			                    for ( var i = 0, length = extras.length; i < length; i += 2)
				                    headers[extras[i]] = extras[i + 1];
		                    else
			                    $H(extras).each(function(pair) {
				                    headers[pair.key] = pair.value
			                    });
	                    }
	                    for ( var name in headers)
		                    this.transport
		                            .setRequestHeader(name, headers[name]);
                    },
                    success : function() {
	                    var status = this.getStatus();
	                    return !status || (status >= 200 && status < 300);
                    },
                    getStatus : function() {
	                    try {
		                    return this.transport.status || 0;
	                    } catch (e) {
		                    return 0
	                    }
                    },
                    respondToReadyState : function(readyState) {
	                    var state = Ajax.Request.Events[readyState], response = new Ajax.Response(
	                            this);
	                    if (state == 'Complete') {
		                    try {
			                    this._complete = true;
			                    (this.options['on' + response.status]
			                            || this.options['on' + (this.success() ? 'Success'
			                                    : 'Failure')] || Prototype.emptyFunction)
			                            (response, response.headerJSON);
		                    } catch (e) {
			                    this.dispatchException(e);
		                    }
		                    var contentType = response
		                            .getHeader('Content-type');
		                    if (this.options.evalJS == 'force'
		                            || (this.options.evalJS
		                                    && this.isSameOrigin()
		                                    && contentType && contentType
		                                    .match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/i)))
			                    this.evalResponse();
	                    }
	                    try {
		                    (this.options['on' + state] || Prototype.emptyFunction)
		                            (response, response.headerJSON);
		                    Ajax.Responders.dispatch('on' + state, this,
		                            response, response.headerJSON);
	                    } catch (e) {
		                    this.dispatchException(e);
	                    }
	                    if (state == 'Complete') {
		                    this.transport.onreadystatechange = Prototype.emptyFunction;
	                    }
                    },
                    isSameOrigin : function() {
	                    var m = this.url.match(/^\s*https?:\/\/[^\/]*/);
	                    return !m
	                            || (m[0] == '#{protocol}//#{domain}#{port}'
	                                    .interpolate( {
	                                        protocol : location.protocol,
	                                        domain : document.domain,
	                                        port : location.port ? ':' + location.port
	                                                : ''
	                                    }));
                    },
                    getHeader : function(name) {
	                    try {
		                    return this.transport.getResponseHeader(name)
		                            || null;
	                    } catch (e) {
		                    return null
	                    }
                    },
                    evalResponse : function() {
	                    try {
		                    return eval((this.transport.responseText || '')
		                            .unfilterJSON());
	                    } catch (e) {
		                    this.dispatchException(e);
	                    }
                    },
                    dispatchException : function(exception) {
	                    (this.options.onException || Prototype.emptyFunction)(
	                            this, exception);
	                    Ajax.Responders
	                            .dispatch('onException', this, exception);
                    }
                });
Ajax.Request.Events = [
        'Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'
];
Ajax.Response = Class
        .create( {
            initialize : function(request) {
	            this.request = request;
	            var transport = this.transport = request.transport, readyState = this.readyState = transport.readyState;
	            if ((readyState > 2 && !Prototype.Browser.IE)
	                    || readyState == 4) {
		            this.status = this.getStatus();
		            this.statusText = this.getStatusText();
		            this.responseText = String
		                    .interpret(transport.responseText);
		            this.headerJSON = this._getHeaderJSON();
	            }
	            if (readyState == 4) {
		            var xml = transport.responseXML;
		            this.responseXML = Object.isUndefined(xml) ? null : xml;
		            this.responseJSON = this._getResponseJSON();
	            }
            },
            status : 0,
            statusText : '',
            getStatus : Ajax.Request.prototype.getStatus,
            getStatusText : function() {
	            try {
		            return this.transport.statusText || '';
	            } catch (e) {
		            return ''
	            }
            },
            getHeader : Ajax.Request.prototype.getHeader,
            getAllHeaders : function() {
	            try {
		            return this.getAllResponseHeaders();
	            } catch (e) {
		            return null
	            }
            },
            getResponseHeader : function(name) {
	            return this.transport.getResponseHeader(name);
            },
            getAllResponseHeaders : function() {
	            return this.transport.getAllResponseHeaders();
            },
            _getHeaderJSON : function() {
	            var json = this.getHeader('X-JSON');
	            if (!json)
		            return null;
	            json = decodeURIComponent(escape(json));
	            try {
		            return json.evalJSON(this.request.options.sanitizeJSON
		                    || !this.request.isSameOrigin());
	            } catch (e) {
		            this.request.dispatchException(e);
	            }
            },
            _getResponseJSON : function() {
	            var options = this.request.options;
	            if (!options.evalJSON
	                    || (options.evalJSON != 'force' && !(this
	                            .getHeader('Content-type') || '')
	                            .include('application/json'))
	                    || this.responseText.blank())
		            return null;
	            try {
		            return this.responseText.evalJSON(options.sanitizeJSON
		                    || !this.request.isSameOrigin());
	            } catch (e) {
		            this.request.dispatchException(e);
	            }
            }
        });
Ajax.Updater = Class.create(Ajax.Request,
        {
            initialize : function($super, container, url, options) {
	            this.container = {
	                success : (container.success || container),
	                failure : (container.failure || (container.success ? null
	                        : container))
	            };
	            options = Object.clone(options);
	            var onComplete = options.onComplete;
	            options.onComplete = (function(response, json) {
		            this.updateContent(response.responseText);
		            if (Object.isFunction(onComplete))
			            onComplete(response, json);
	            }).bind(this);
	            $super(url, options);
            },
            updateContent : function(responseText) {
	            var receiver = this.container[this.success() ? 'success'
	                    : 'failure'], options = this.options;
	            if (!options.evalScripts)
		            responseText = responseText.stripScripts();
	            if (receiver = $(receiver)) {
		            if (options.insertion) {
			            if (Object.isString(options.insertion)) {
				            var insertion = {};
				            insertion[options.insertion] = responseText;
				            receiver.insert(insertion);
			            } else
				            options.insertion(receiver, responseText);
		            } else
			            receiver.update(responseText);
	            }
            }
        });
Ajax.PeriodicalUpdater = Class
        .create(
                Ajax.Base,
                {
                    initialize : function($super, container, url, options) {
	                    $super(options);
	                    this.onComplete = this.options.onComplete;
	                    this.frequency = (this.options.frequency || 2);
	                    this.decay = (this.options.decay || 1);
	                    this.updater = {};
	                    this.container = container;
	                    this.url = url;
	                    this.start();
                    },
                    start : function() {
	                    this.options.onComplete = this.updateComplete
	                            .bind(this);
	                    this.onTimerEvent();
                    },
                    stop : function() {
	                    this.updater.options.onComplete = undefined;
	                    clearTimeout(this.timer);
	                    (this.onComplete || Prototype.emptyFunction).apply(
	                            this, arguments);
                    },
                    updateComplete : function(response) {
	                    if (this.options.decay) {
		                    this.decay = (response.responseText == this.lastText ? this.decay
		                            * this.options.decay
		                            : 1);
		                    this.lastText = response.responseText;
	                    }
	                    this.timer = this.onTimerEvent.bind(this).delay(
	                            this.decay * this.frequency);
                    },
                    onTimerEvent : function() {
	                    this.updater = new Ajax.Updater(this.container,
	                            this.url, this.options);
                    }
                });
function $(element) {
	if (arguments.length > 1) {
		for ( var i = 0, elements = [], length = arguments.length; i < length; i++)
			elements.push($(arguments[i]));
		return elements;
	}
	if (Object.isString(element))
		element = document.getElementById(element);
	return Element.extend(element);
}
if (Prototype.BrowserFeatures.XPath) {
	document._getElementsByXPath = function(expression, parentElement) {
		var results = [];
		var query = document.evaluate(expression, $(parentElement) || document,
		        null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
		for ( var i = 0, length = query.snapshotLength; i < length; i++)
			results.push(Element.extend(query.snapshotItem(i)));
		return results;
	};
}
if (!window.Node)
	var Node = {};
if (!Node.ELEMENT_NODE) {
	Object.extend(Node, {
	    ELEMENT_NODE : 1,
	    ATTRIBUTE_NODE : 2,
	    TEXT_NODE : 3,
	    CDATA_SECTION_NODE : 4,
	    ENTITY_REFERENCE_NODE : 5,
	    ENTITY_NODE : 6,
	    PROCESSING_INSTRUCTION_NODE : 7,
	    COMMENT_NODE : 8,
	    DOCUMENT_NODE : 9,
	    DOCUMENT_TYPE_NODE : 10,
	    DOCUMENT_FRAGMENT_NODE : 11,
	    NOTATION_NODE : 12
	});
}
(function() {
	var element = this.Element;
	this.Element = function(tagName, attributes) {
		attributes = attributes || {};
		tagName = tagName.toLowerCase();
		var cache = Element.cache;
		if (Prototype.Browser.IE && attributes.name) {
			tagName = '<' + tagName + ' name="' + attributes.name + '">';
			delete attributes.name;
			return Element.writeAttribute(document.createElement(tagName),
			        attributes);
		}
		if (!cache[tagName])
			cache[tagName] = Element.extend(document.createElement(tagName));
		return Element.writeAttribute(cache[tagName].cloneNode(false),
		        attributes);
	};
	Object.extend(this.Element, element || {});
}).call(window);
Element.cache = {};
Element.Methods = {
    visible : function(element) {
	    return $(element).style.display != 'none';
    },
    toggle : function(element) {
	    element = $(element);
	    Element[Element.visible(element) ? 'hide' : 'show'](element);
	    return element;
    },
    hide : function(element) {
	    $(element).style.display = 'none';
	    return element;
    },
    show : function(element) {
	    $(element).style.display = '';
	    return element;
    },
    remove : function(element) {
	    element = $(element);
	    element.parentNode.removeChild(element);
	    return element;
    },
    update : function(element, content) {
	    element = $(element);
	    if (content && content.toElement)
		    content = content.toElement();
	    if (Object.isElement(content))
		    return element.update().insert(content);
	    content = Object.toHTML(content);
	    element.innerHTML = content.stripScripts();
	    content.evalScripts.bind(content).defer();
	    return element;
    },
    replace : function(element, content) {
	    element = $(element);
	    if (content && content.toElement)
		    content = content.toElement();
	    else if (!Object.isElement(content)) {
		    content = Object.toHTML(content);
		    var range = element.ownerDocument.createRange();
		    range.selectNode(element);
		    content.evalScripts.bind(content).defer();
		    content = range.createContextualFragment(content.stripScripts());
	    }
	    element.parentNode.replaceChild(content, element);
	    return element;
    },
    insert : function(element, insertions) {
	    element = $(element);
	    if (Object.isString(insertions) || Object.isNumber(insertions)
	            || Object.isElement(insertions)
	            || (insertions && (insertions.toElement || insertions.toHTML)))
		    insertions = {
			    bottom : insertions
		    };
	    var content, insert, tagName, childNodes;
	    for ( var position in insertions) {
		    content = insertions[position];
		    position = position.toLowerCase();
		    insert = Element._insertionTranslations[position];
		    if (content && content.toElement)
			    content = content.toElement();
		    if (Object.isElement(content)) {
			    insert(element, content);
			    continue;
		    }
		    content = Object.toHTML(content);
		    tagName = ((position == 'before' || position == 'after') ? element.parentNode
		            : element).tagName.toUpperCase();
		    childNodes = Element._getContentFromAnonymousElement(tagName,
		            content.stripScripts());
		    if (position == 'top' || position == 'after')
			    childNodes.reverse();
		    childNodes.each(insert.curry(element));
		    content.evalScripts.bind(content).defer();
	    }
	    return element;
    },
    wrap : function(element, wrapper, attributes) {
	    element = $(element);
	    if (Object.isElement(wrapper))
		    $(wrapper).writeAttribute(attributes || {});
	    else if (Object.isString(wrapper))
		    wrapper = new Element(wrapper, attributes);
	    else
		    wrapper = new Element('div', wrapper);
	    if (element.parentNode)
		    element.parentNode.replaceChild(wrapper, element);
	    wrapper.appendChild(element);
	    return wrapper;
    },
    inspect : function(element) {
	    element = $(element);
	    var result = '<' + element.tagName.toLowerCase();
	    $H( {
	        'id' : 'id',
	        'className' : 'class'
	    }).each(function(pair) {
		    var property = pair.first(), attribute = pair.last();
		    var value = (element[property] || '').toString();
		    if (value)
			    result += ' ' + attribute + '=' + value.inspect(true);
	    });
	    return result + '>';
    },
    recursivelyCollect : function(element, property) {
	    element = $(element);
	    var elements = [];
	    while (element = element[property])
		    if (element.nodeType == 1)
			    elements.push(Element.extend(element));
	    return elements;
    },
    ancestors : function(element) {
	    return $(element).recursivelyCollect('parentNode');
    },
    descendants : function(element) {
	    return $(element).select("*");
    },
    firstDescendant : function(element) {
	    element = $(element).firstChild;
	    while (element && element.nodeType != 1)
		    element = element.nextSibling;
	    return $(element);
    },
    immediateDescendants : function(element) {
	    if (!(element = $(element).firstChild))
		    return [];
	    while (element && element.nodeType != 1)
		    element = element.nextSibling;
	    if (element)
		    return [
			    element
		    ].concat($(element).nextSiblings());
	    return [];
    },
    previousSiblings : function(element) {
	    return $(element).recursivelyCollect('previousSibling');
    },
    nextSiblings : function(element) {
	    return $(element).recursivelyCollect('nextSibling');
    },
    siblings : function(element) {
	    element = $(element);
	    return element.previousSiblings().reverse().concat(
	            element.nextSiblings());
    },
    match : function(element, selector) {
	    if (Object.isString(selector))
		    selector = new Selector(selector);
	    return selector.match($(element));
    },
    up : function(element, expression, index) {
	    element = $(element);
	    if (arguments.length == 1)
		    return $(element.parentNode);
	    var ancestors = element.ancestors();
	    return Object.isNumber(expression) ? ancestors[expression] : Selector
	            .findElement(ancestors, expression, index);
    },
    down : function(element, expression, index) {
	    element = $(element);
	    if (arguments.length == 1)
		    return element.firstDescendant();
	    return Object.isNumber(expression) ? element.descendants()[expression]
	            : element.select(expression)[index || 0];
    },
    previous : function(element, expression, index) {
	    element = $(element);
	    if (arguments.length == 1)
		    return $(Selector.handlers.previousElementSibling(element));
	    var previousSiblings = element.previousSiblings();
	    return Object.isNumber(expression) ? previousSiblings[expression]
	            : Selector.findElement(previousSiblings, expression, index);
    },
    next : function(element, expression, index) {
	    element = $(element);
	    if (arguments.length == 1)
		    return $(Selector.handlers.nextElementSibling(element));
	    var nextSiblings = element.nextSiblings();
	    return Object.isNumber(expression) ? nextSiblings[expression]
	            : Selector.findElement(nextSiblings, expression, index);
    },
    select : function() {
	    var args = $A(arguments), element = $(args.shift());
	    return Selector.findChildElements(element, args);
    },
    adjacent : function() {
	    var args = $A(arguments), element = $(args.shift());
	    return Selector.findChildElements(element.parentNode, args).without(
	            element);
    },
    identify : function(element) {
	    element = $(element);
	    var id = element.readAttribute('id'), self = arguments.callee;
	    if (id)
		    return id;
	    do {
		    id = 'anonymous_element_' + self.counter++
	    } while ($(id));
	    element.writeAttribute('id', id);
	    return id;
    },
    readAttribute : function(element, name) {
	    element = $(element);
	    if (Prototype.Browser.IE) {
		    var t = Element._attributeTranslations.read;
		    if (t.values[name])
			    return t.values[name](element, name);
		    if (t.names[name])
			    name = t.names[name];
		    if (name.include(':')) {
			    return (!element.attributes || !element.attributes[name]) ? null
			            : element.attributes[name].value;
		    }
	    }
	    return element.getAttribute(name);
    },
    writeAttribute : function(element, name, value) {
	    element = $(element);
	    var attributes = {}, t = Element._attributeTranslations.write;
	    if (typeof name == 'object')
		    attributes = name;
	    else
		    attributes[name] = Object.isUndefined(value) ? true : value;
	    for ( var attr in attributes) {
		    name = t.names[attr] || attr;
		    value = attributes[attr];
		    if (t.values[attr])
			    name = t.values[attr](element, value);
		    if (value === false || value === null)
			    element.removeAttribute(name);
		    else if (value === true)
			    element.setAttribute(name, name);
		    else
			    element.setAttribute(name, value);
	    }
	    return element;
    },
    getHeight : function(element) {
	    return $(element).getDimensions().height;
    },
    getWidth : function(element) {
	    return $(element).getDimensions().width;
    },
    classNames : function(element) {
	    return new Element.ClassNames(element);
    },
    hasClassName : function(element, className) {
	    if (!(element = $(element)))
		    return;
	    var elementClassName = element.className;
	    return (elementClassName.length > 0 && (elementClassName == className || new RegExp(
	            "(^|\\s)" + className + "(\\s|$)").test(elementClassName)));
    },
    addClassName : function(element, className) {
	    if (!(element = $(element)))
		    return;
	    if (!element.hasClassName(className))
		    element.className += (element.className ? ' ' : '') + className;
	    return element;
    },
    removeClassName : function(element, className) {
	    if (!(element = $(element)))
		    return;
	    element.className = element.className.replace(
	            new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' ').strip();
	    return element;
    },
    toggleClassName : function(element, className) {
	    if (!(element = $(element)))
		    return;
	    return element[element.hasClassName(className) ? 'removeClassName'
	            : 'addClassName'](className);
    },
    cleanWhitespace : function(element) {
	    element = $(element);
	    var node = element.firstChild;
	    while (node) {
		    var nextNode = node.nextSibling;
		    if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
			    element.removeChild(node);
		    node = nextNode;
	    }
	    return element;
    },
    empty : function(element) {
	    return $(element).innerHTML.blank();
    },
    descendantOf : function(element, ancestor) {
	    element = $(element), ancestor = $(ancestor);
	    var originalAncestor = ancestor;
	    if (element.compareDocumentPosition)
		    return (element.compareDocumentPosition(ancestor) & 8) === 8;
	    if (element.sourceIndex && !Prototype.Browser.Opera) {
		    var e = element.sourceIndex, a = ancestor.sourceIndex, nextAncestor = ancestor.nextSibling;
		    if (!nextAncestor) {
			    do {
				    ancestor = ancestor.parentNode;
			    } while (!(nextAncestor = ancestor.nextSibling)
			            && ancestor.parentNode);
		    }
		    if (nextAncestor && nextAncestor.sourceIndex)
			    return (e > a && e < nextAncestor.sourceIndex);
	    }
	    while (element = element.parentNode)
		    if (element == originalAncestor)
			    return true;
	    return false;
    },
    scrollTo : function(element) {
	    element = $(element);
	    var pos = element.cumulativeOffset();
	    window.scrollTo(pos[0], pos[1]);
	    return element;
    },
    getStyle : function(element, style) {
	    element = $(element);
	    style = style == 'float' ? 'cssFloat' : style.camelize();
	    var value = element.style[style];
	    if (!value) {
		    var css = document.defaultView.getComputedStyle(element, null);
		    value = css ? css[style] : null;
	    }
	    if (style == 'opacity')
		    return value ? parseFloat(value) : 1.0;
	    return value == 'auto' ? null : value;
    },
    getOpacity : function(element) {
	    return $(element).getStyle('opacity');
    },
    setStyle : function(element, styles) {
	    element = $(element);
	    var elementStyle = element.style, match;
	    if (Object.isString(styles)) {
		    element.style.cssText += ';' + styles;
		    return styles.include('opacity') ? element.setOpacity(styles
		            .match(/opacity:\s*(\d?\.?\d*)/)[1]) : element;
	    }
	    for ( var property in styles)
		    if (property == 'opacity')
			    element.setOpacity(styles[property]);
		    else
			    elementStyle[(property == 'float' || property == 'cssFloat') ? (Object
			            .isUndefined(elementStyle.styleFloat) ? 'cssFloat'
			            : 'styleFloat')
			            : property] = styles[property];
	    return element;
    },
    setOpacity : function(element, value) {
	    element = $(element);
	    element.style.opacity = (value == 1 || value === '') ? ''
	            : (value < 0.00001) ? 0 : value;
	    return element;
    },
    getDimensions : function(element) {
	    element = $(element);
	    var display = $(element).getStyle('display');
	    if (display != 'none' && display != null)
		    return {
		        width : element.offsetWidth,
		        height : element.offsetHeight
		    };
	    var els = element.style;
	    var originalVisibility = els.visibility;
	    var originalPosition = els.position;
	    var originalDisplay = els.display;
	    els.visibility = 'hidden';
	    els.position = 'absolute';
	    els.display = 'block';
	    var originalWidth = element.clientWidth;
	    var originalHeight = element.clientHeight;
	    els.display = originalDisplay;
	    els.position = originalPosition;
	    els.visibility = originalVisibility;
	    return {
	        width : originalWidth,
	        height : originalHeight
	    };
    },
    makePositioned : function(element) {
	    element = $(element);
	    var pos = Element.getStyle(element, 'position');
	    if (pos == 'static' || !pos) {
		    element._madePositioned = true;
		    element.style.position = 'relative';
		    if (window.opera) {
			    element.style.top = 0;
			    element.style.left = 0;
		    }
	    }
	    return element;
    },
    undoPositioned : function(element) {
	    element = $(element);
	    if (element._madePositioned) {
		    element._madePositioned = undefined;
		    element.style.position = element.style.top = element.style.left = element.style.bottom = element.style.right = '';
	    }
	    return element;
    },
    makeClipping : function(element) {
	    element = $(element);
	    if (element._overflow)
		    return element;
	    element._overflow = Element.getStyle(element, 'overflow') || 'auto';
	    if (element._overflow !== 'hidden')
		    element.style.overflow = 'hidden';
	    return element;
    },
    undoClipping : function(element) {
	    element = $(element);
	    if (!element._overflow)
		    return element;
	    element.style.overflow = element._overflow == 'auto' ? ''
	            : element._overflow;
	    element._overflow = null;
	    return element;
    },
    cumulativeOffset : function(element) {
	    var valueT = 0, valueL = 0;
	    do {
		    valueT += element.offsetTop || 0;
		    valueL += element.offsetLeft || 0;
		    element = element.offsetParent;
	    } while (element);
	    return Element._returnOffset(valueL, valueT);
    },
    positionedOffset : function(element) {
	    var valueT = 0, valueL = 0;
	    do {
		    valueT += element.offsetTop || 0;
		    valueL += element.offsetLeft || 0;
		    element = element.offsetParent;
		    if (element) {
			    if (element.tagName == 'BODY')
				    break;
			    var p = Element.getStyle(element, 'position');
			    if (p !== 'static')
				    break;
		    }
	    } while (element);
	    return Element._returnOffset(valueL, valueT);
    },
    absolutize : function(element) {
	    element = $(element);
	    if (element.getStyle('position') == 'absolute')
		    return;
	    var offsets = element.positionedOffset();
	    var top = offsets[1];
	    var left = offsets[0];
	    var width = element.clientWidth;
	    var height = element.clientHeight;
	    element._originalLeft = left - parseFloat(element.style.left || 0);
	    element._originalTop = top - parseFloat(element.style.top || 0);
	    element._originalWidth = element.style.width;
	    element._originalHeight = element.style.height;
	    element.style.position = 'absolute';
	    element.style.top = top + 'px';
	    element.style.left = left + 'px';
	    element.style.width = width + 'px';
	    element.style.height = height + 'px';
	    return element;
    },
    relativize : function(element) {
	    element = $(element);
	    if (element.getStyle('position') == 'relative')
		    return;
	    element.style.position = 'relative';
	    var top = parseFloat(element.style.top || 0)
	            - (element._originalTop || 0);
	    var left = parseFloat(element.style.left || 0)
	            - (element._originalLeft || 0);
	    element.style.top = top + 'px';
	    element.style.left = left + 'px';
	    element.style.height = element._originalHeight;
	    element.style.width = element._originalWidth;
	    return element;
    },
    cumulativeScrollOffset : function(element) {
	    var valueT = 0, valueL = 0;
	    do {
		    valueT += element.scrollTop || 0;
		    valueL += element.scrollLeft || 0;
		    element = element.parentNode;
	    } while (element);
	    return Element._returnOffset(valueL, valueT);
    },
    getOffsetParent : function(element) {
	    if (element.offsetParent)
		    return $(element.offsetParent);
	    if (element == document.body)
		    return $(element);
	    while ((element = element.parentNode) && element != document.body)
		    if (Element.getStyle(element, 'position') != 'static')
			    return $(element);
	    return $(document.body);
    },
    viewportOffset : function(forElement) {
	    var valueT = 0, valueL = 0;
	    var element = forElement;
	    do {
		    valueT += element.offsetTop || 0;
		    valueL += element.offsetLeft || 0;
		    if (element.offsetParent == document.body
		            && Element.getStyle(element, 'position') == 'absolute')
			    break;
	    } while (element = element.offsetParent);
	    element = forElement;
	    do {
		    if (!Prototype.Browser.Opera || element.tagName == 'BODY') {
			    valueT -= element.scrollTop || 0;
			    valueL -= element.scrollLeft || 0;
		    }
	    } while (element = element.parentNode);
	    return Element._returnOffset(valueL, valueT);
    },
    clonePosition : function(element, source) {
	    var options = Object.extend( {
	        setLeft : true,
	        setTop : true,
	        setWidth : true,
	        setHeight : true,
	        offsetTop : 0,
	        offsetLeft : 0
	    }, arguments[2] || {});
	    source = $(source);
	    var p = source.viewportOffset();
	    element = $(element);
	    var delta = [
	            0, 0
	    ];
	    var parent = null;
	    if (Element.getStyle(element, 'position') == 'absolute') {
		    parent = element.getOffsetParent();
		    delta = parent.viewportOffset();
	    }
	    if (parent == document.body) {
		    delta[0] -= document.body.offsetLeft;
		    delta[1] -= document.body.offsetTop;
	    }
	    if (options.setLeft)
		    element.style.left = (p[0] - delta[0] + options.offsetLeft) + 'px';
	    if (options.setTop)
		    element.style.top = (p[1] - delta[1] + options.offsetTop) + 'px';
	    if (options.setWidth)
		    element.style.width = source.offsetWidth + 'px';
	    if (options.setHeight)
		    element.style.height = source.offsetHeight + 'px';
	    return element;
    }
};
Element.Methods.identify.counter = 1;
Object.extend(Element.Methods, {
    getElementsBySelector : Element.Methods.select,
    childElements : Element.Methods.immediateDescendants
});
Element._attributeTranslations = {
	write : {
	    names : {
	        className : 'class',
	        htmlFor : 'for'
	    },
	    values : {}
	}
};
if (Prototype.Browser.Opera) {
	Element.Methods.getStyle = Element.Methods.getStyle.wrap(function(proceed,
	        element, style) {
		switch (style) {
			case 'left':
			case 'top':
			case 'right':
			case 'bottom':
				if (proceed(element, 'position') === 'static')
					return null;
			case 'height':
			case 'width':
				if (!Element.visible(element))
					return null;
				var dim = parseInt(proceed(element, style), 10);
				if (dim !== element['offset' + style.capitalize()])
					return dim + 'px';
				var properties;
				if (style === 'height') {
					properties = [
					        'border-top-width', 'padding-top',
					        'padding-bottom', 'border-bottom-width'
					];
				} else {
					properties = [
					        'border-left-width', 'padding-left',
					        'padding-right', 'border-right-width'
					];
				}
				return properties.inject(dim, function(memo, property) {
					var val = proceed(element, property);
					return val === null ? memo : memo - parseInt(val, 10);
				}) + 'px';
			default:
				return proceed(element, style);
		}
	});
	Element.Methods.readAttribute = Element.Methods.readAttribute
	        .wrap(function(proceed, element, attribute) {
		        if (attribute === 'title')
			        return element.title;
		        return proceed(element, attribute);
	        });
} else if (Prototype.Browser.IE) {
	Element.Methods.getOffsetParent = Element.Methods.getOffsetParent
	        .wrap(function(proceed, element) {
		        element = $(element);
		        var position = element.getStyle('position');
		        if (position !== 'static')
			        return proceed(element);
		        element.setStyle( {
			        position : 'relative'
		        });
		        var value = proceed(element);
		        element.setStyle( {
			        position : position
		        });
		        return value;
	        });
	$w('positionedOffset viewportOffset')
	        .each(
	                function(method) {
		                Element.Methods[method] = Element.Methods[method]
		                        .wrap(function(proceed, element) {
			                        element = $(element);
			                        var position = element.getStyle('position');
			                        if (position !== 'static')
				                        return proceed(element);
			                        var offsetParent = element
			                                .getOffsetParent();
			                        if (offsetParent
			                                && offsetParent
			                                        .getStyle('position') === 'fixed')
				                        offsetParent.setStyle( {
					                        zoom : 1
				                        });
			                        element.setStyle( {
				                        position : 'relative'
			                        });
			                        var value = proceed(element);
			                        element.setStyle( {
				                        position : position
			                        });
			                        return value;
		                        });
	                });
	Element.Methods.getStyle = function(element, style) {
		element = $(element);
		style = (style == 'float' || style == 'cssFloat') ? 'styleFloat'
		        : style.camelize();
		var value = element.style[style];
		if (!value && element.currentStyle)
			value = element.currentStyle[style];
		if (style == 'opacity') {
			if (value = (element.getStyle('filter') || '')
			        .match(/alpha\(opacity=(.*)\)/))
				if (value[1])
					return parseFloat(value[1]) / 100;
			return 1.0;
		}
		if (value == 'auto') {
			if ((style == 'width' || style == 'height')
			        && (element.getStyle('display') != 'none'))
				return element['offset' + style.capitalize()] + 'px';
			return null;
		}
		return value;
	};
	Element.Methods.setOpacity = function(element, value) {
		function stripAlpha(filter) {
			return filter.replace(/alpha\([^\)]*\)/gi, '');
		}
		element = $(element);
		var currentStyle = element.currentStyle;
		if ((currentStyle && !currentStyle.hasLayout)
		        || (!currentStyle && element.style.zoom == 'normal'))
			element.style.zoom = 1;
		var filter = element.getStyle('filter'), style = element.style;
		if (value == 1 || value === '') {
			(filter = stripAlpha(filter)) ? style.filter = filter : style
			        .removeAttribute('filter');
			return element;
		} else if (value < 0.00001)
			value = 0;
		style.filter = stripAlpha(filter) + 'alpha(opacity=' + (value * 100)
		        + ')';
		return element;
	};
	Element._attributeTranslations = {
		read : {
		    names : {
		        'class' : 'className',
		        'for' : 'htmlFor'
		    },
		    values : {
		        _getAttr : function(element, attribute) {
			        return element.getAttribute(attribute, 2);
		        },
		        _getAttrNode : function(element, attribute) {
			        var node = element.getAttributeNode(attribute);
			        return node ? node.value : "";
		        },
		        _getEv : function(element, attribute) {
			        attribute = element.getAttribute(attribute);
			        return attribute ? attribute.toString().slice(23, -2)
			                : null;
		        },
		        _flag : function(element, attribute) {
			        return $(element).hasAttribute(attribute) ? attribute
			                : null;
		        },
		        style : function(element) {
			        return element.style.cssText.toLowerCase();
		        },
		        title : function(element) {
			        return element.title;
		        }
		    }
		}
	};
	Element._attributeTranslations.write = {
	    names : Object.extend( {
	        cellpadding : 'cellPadding',
	        cellspacing : 'cellSpacing'
	    }, Element._attributeTranslations.read.names),
	    values : {
	        checked : function(element, value) {
		        element.checked = !!value;
	        },
	        style : function(element, value) {
		        element.style.cssText = value ? value : '';
	        }
	    }
	};
	Element._attributeTranslations.has = {};
	$w(
	        'colSpan rowSpan vAlign dateTime accessKey tabIndex ' + 'encType maxLength readOnly longDesc')
	        .each(
	                function(attr) {
		                Element._attributeTranslations.write.names[attr
		                        .toLowerCase()] = attr;
		                Element._attributeTranslations.has[attr.toLowerCase()] = attr;
	                });
	(function(v) {
		Object.extend(v, {
		    href : v._getAttr,
		    src : v._getAttr,
		    type : v._getAttr,
		    action : v._getAttrNode,
		    disabled : v._flag,
		    checked : v._flag,
		    readonly : v._flag,
		    multiple : v._flag,
		    onload : v._getEv,
		    onunload : v._getEv,
		    onclick : v._getEv,
		    ondblclick : v._getEv,
		    onmousedown : v._getEv,
		    onmouseup : v._getEv,
		    onmouseover : v._getEv,
		    onmousemove : v._getEv,
		    onmouseout : v._getEv,
		    onfocus : v._getEv,
		    onblur : v._getEv,
		    onkeypress : v._getEv,
		    onkeydown : v._getEv,
		    onkeyup : v._getEv,
		    onsubmit : v._getEv,
		    onreset : v._getEv,
		    onselect : v._getEv,
		    onchange : v._getEv
		});
	})(Element._attributeTranslations.read.values);
} else if (Prototype.Browser.Gecko && /rv:1\.8\.0/.test(navigator.userAgent)) {
	Element.Methods.setOpacity = function(element, value) {
		element = $(element);
		element.style.opacity = (value == 1) ? 0.999999 : (value === '') ? ''
		        : (value < 0.00001) ? 0 : value;
		return element;
	};
} else if (Prototype.Browser.WebKit) {
	Element.Methods.setOpacity = function(element, value) {
		element = $(element);
		element.style.opacity = (value == 1 || value === '') ? ''
		        : (value < 0.00001) ? 0 : value;
		if (value == 1)
			if (element.tagName == 'IMG' && element.width) {
				element.width++;
				element.width--;
			} else
				try {
					var n = document.createTextNode(' ');
					element.appendChild(n);
					element.removeChild(n);
				} catch (e) {
				}
		return element;
	};
	Element.Methods.cumulativeOffset = function(element) {
		var valueT = 0, valueL = 0;
		do {
			valueT += element.offsetTop || 0;
			valueL += element.offsetLeft || 0;
			if (element.offsetParent == document.body)
				if (Element.getStyle(element, 'position') == 'absolute')
					break;
			element = element.offsetParent;
		} while (element);
		return Element._returnOffset(valueL, valueT);
	};
}
if (Prototype.Browser.IE || Prototype.Browser.Opera) {
	Element.Methods.update = function(element, content) {
		element = $(element);
		if (content && content.toElement)
			content = content.toElement();
		if (Object.isElement(content))
			return element.update().insert(content);
		content = Object.toHTML(content);
		var tagName = element.tagName.toUpperCase();
		if (tagName in Element._insertionTranslations.tags) {
			$A(element.childNodes).each(function(node) {
				element.removeChild(node)
			});
			Element._getContentFromAnonymousElement(tagName,
			        content.stripScripts()).each(function(node) {
				element.appendChild(node)
			});
		} else
			element.innerHTML = content.stripScripts();
		content.evalScripts.bind(content).defer();
		return element;
	};
}
if ('outerHTML' in document.createElement('div')) {
	Element.Methods.replace = function(element, content) {
		element = $(element);
		if (content && content.toElement)
			content = content.toElement();
		if (Object.isElement(content)) {
			element.parentNode.replaceChild(content, element);
			return element;
		}
		content = Object.toHTML(content);
		var parent = element.parentNode, tagName = parent.tagName.toUpperCase();
		if (Element._insertionTranslations.tags[tagName]) {
			var nextSibling = element.next();
			var fragments = Element._getContentFromAnonymousElement(tagName,
			        content.stripScripts());
			parent.removeChild(element);
			if (nextSibling)
				fragments.each(function(node) {
					parent.insertBefore(node, nextSibling)
				});
			else
				fragments.each(function(node) {
					parent.appendChild(node)
				});
		} else
			element.outerHTML = content.stripScripts();
		content.evalScripts.bind(content).defer();
		return element;
	};
}
Element._returnOffset = function(l, t) {
	var result = [
	        l, t
	];
	result.left = l;
	result.top = t;
	return result;
};
Element._getContentFromAnonymousElement = function(tagName, html) {
	var div = new Element('div'), t = Element._insertionTranslations.tags[tagName];
	if (t) {
		div.innerHTML = t[0] + html + t[1];
		t[2].times(function() {
			div = div.firstChild
		});
	} else
		div.innerHTML = html;
	return $A(div.childNodes);
};
Element._insertionTranslations = {
    before : function(element, node) {
	    element.parentNode.insertBefore(node, element);
    },
    top : function(element, node) {
	    element.insertBefore(node, element.firstChild);
    },
    bottom : function(element, node) {
	    element.appendChild(node);
    },
    after : function(element, node) {
	    element.parentNode.insertBefore(node, element.nextSibling);
    },
    tags : {
        TABLE : [
                '<table>', '</table>', 1
        ],
        TBODY : [
                '<table><tbody>', '</tbody></table>', 2
        ],
        TR : [
                '<table><tbody><tr>', '</tr></tbody></table>', 3
        ],
        TD : [
                '<table><tbody><tr><td>', '</td></tr></tbody></table>', 4
        ],
        SELECT : [
                '<select>', '</select>', 1
        ]
    }
};
(function() {
	Object.extend(this.tags, {
	    THEAD : this.tags.TBODY,
	    TFOOT : this.tags.TBODY,
	    TH : this.tags.TD
	});
}).call(Element._insertionTranslations);
Element.Methods.Simulated = {
	hasAttribute : function(element, attribute) {
		attribute = Element._attributeTranslations.has[attribute] || attribute;
		var node = $(element).getAttributeNode(attribute);
		return node && node.specified;
	}
};
Element.Methods.ByTag = {};
Object.extend(Element, Element.Methods);
if (!Prototype.BrowserFeatures.ElementExtensions
        && document.createElement('div').__proto__) {
	window.HTMLElement = {};
	window.HTMLElement.prototype = document.createElement('div').__proto__;
	Prototype.BrowserFeatures.ElementExtensions = true;
}
Element.extend = (function() {
	if (Prototype.BrowserFeatures.SpecificElementExtensions)
		return Prototype.K;
	var Methods = {}, ByTag = Element.Methods.ByTag;
	var extend = Object
	        .extend(
	                function(element) {
		                if (!element || element._extendedByPrototype
		                        || element.nodeType != 1 || element == window)
			                return element;
		                var methods = Object.clone(Methods), tagName = element.tagName, property, value;
		                if (ByTag[tagName])
			                Object.extend(methods, ByTag[tagName]);
		                for (property in methods) {
			                value = methods[property];
			                if (Object.isFunction(value)
			                        && !(property in element))
				                element[property] = value.methodize();
		                }
		                element._extendedByPrototype = Prototype.emptyFunction;
		                return element;
	                }, {
		                refresh : function() {
			                if (!Prototype.BrowserFeatures.ElementExtensions) {
				                Object.extend(Methods, Element.Methods);
				                Object.extend(Methods,
				                        Element.Methods.Simulated);
			                }
		                }
	                });
	extend.refresh();
	return extend;
})();
Element.hasAttribute = function(element, attribute) {
	if (element.hasAttribute)
		return element.hasAttribute(attribute);
	return Element.Methods.Simulated.hasAttribute(element, attribute);
};
Element.addMethods = function(methods) {
	var F = Prototype.BrowserFeatures, T = Element.Methods.ByTag;
	if (!methods) {
		Object.extend(Form, Form.Methods);
		Object.extend(Form.Element, Form.Element.Methods);
		Object.extend(Element.Methods.ByTag, {
		    "FORM" : Object.clone(Form.Methods),
		    "INPUT" : Object.clone(Form.Element.Methods),
		    "SELECT" : Object.clone(Form.Element.Methods),
		    "TEXTAREA" : Object.clone(Form.Element.Methods)
		});
	}
	if (arguments.length == 2) {
		var tagName = methods;
		methods = arguments[1];
	}
	if (!tagName)
		Object.extend(Element.Methods, methods || {});
	else {
		if (Object.isArray(tagName))
			tagName.each(extend);
		else
			extend(tagName);
	}
	function extend(tagName) {
		tagName = tagName.toUpperCase();
		if (!Element.Methods.ByTag[tagName])
			Element.Methods.ByTag[tagName] = {};
		Object.extend(Element.Methods.ByTag[tagName], methods);
	}
	function copy(methods, destination, onlyIfAbsent) {
		onlyIfAbsent = onlyIfAbsent || false;
		for ( var property in methods) {
			var value = methods[property];
			if (!Object.isFunction(value))
				continue;
			if (!onlyIfAbsent || !(property in destination))
				destination[property] = value.methodize();
		}
	}
	function findDOMClass(tagName) {
		var klass;
		var trans = {
		    "OPTGROUP" : "OptGroup",
		    "TEXTAREA" : "TextArea",
		    "P" : "Paragraph",
		    "FIELDSET" : "FieldSet",
		    "UL" : "UList",
		    "OL" : "OList",
		    "DL" : "DList",
		    "DIR" : "Directory",
		    "H1" : "Heading",
		    "H2" : "Heading",
		    "H3" : "Heading",
		    "H4" : "Heading",
		    "H5" : "Heading",
		    "H6" : "Heading",
		    "Q" : "Quote",
		    "INS" : "Mod",
		    "DEL" : "Mod",
		    "A" : "Anchor",
		    "IMG" : "Image",
		    "CAPTION" : "TableCaption",
		    "COL" : "TableCol",
		    "COLGROUP" : "TableCol",
		    "THEAD" : "TableSection",
		    "TFOOT" : "TableSection",
		    "TBODY" : "TableSection",
		    "TR" : "TableRow",
		    "TH" : "TableCell",
		    "TD" : "TableCell",
		    "FRAMESET" : "FrameSet",
		    "IFRAME" : "IFrame"
		};
		if (trans[tagName])
			klass = 'HTML' + trans[tagName] + 'Element';
		if (window[klass])
			return window[klass];
		klass = 'HTML' + tagName + 'Element';
		if (window[klass])
			return window[klass];
		klass = 'HTML' + tagName.capitalize() + 'Element';
		if (window[klass])
			return window[klass];
		window[klass] = {};
		window[klass].prototype = document.createElement(tagName).__proto__;
		return window[klass];
	}
	if (F.ElementExtensions) {
		copy(Element.Methods, HTMLElement.prototype);
		copy(Element.Methods.Simulated, HTMLElement.prototype, true);
	}
	if (F.SpecificElementExtensions) {
		for ( var tag in Element.Methods.ByTag) {
			var klass = findDOMClass(tag);
			if (Object.isUndefined(klass))
				continue;
			copy(T[tag], klass.prototype);
		}
	}
	Object.extend(Element, Element.Methods);
	delete Element.ByTag;
	if (Element.extend.refresh)
		Element.extend.refresh();
	Element.cache = {};
};
document.viewport = {
    getDimensions : function() {
	    var dimensions = {};
	    var B = Prototype.Browser;
	    $w('width height')
	            .each(
	                    function(d) {
		                    var D = d.capitalize();
		                    dimensions[d] = (B.WebKit && !document.evaluate) ? self['inner' + D]
		                            : (B.Opera) ? document.body['client' + D]
		                                    : document.documentElement['client' + D];
	                    });
	    return dimensions;
    },
    getWidth : function() {
	    return this.getDimensions().width;
    },
    getHeight : function() {
	    return this.getDimensions().height;
    },
    getScrollOffsets : function() {
	    return Element._returnOffset(window.pageXOffset
	            || document.documentElement.scrollLeft
	            || document.body.scrollLeft, window.pageYOffset
	            || document.documentElement.scrollTop
	            || document.body.scrollTop);
    }
};
var Selector = Class
        .create( {
            initialize : function(expression) {
	            this.expression = expression.strip();
	            this.compileMatcher();
            },
            shouldUseXPath : function() {
	            if (!Prototype.BrowserFeatures.XPath)
		            return false;
	            var e = this.expression;
	            if (Prototype.Browser.WebKit
	                    && (e.include("-of-type") || e.include(":empty")))
		            return false;
	            if ((/(\[[\w-]*?:|:checked)/).test(this.expression))
		            return false;
	            return true;
            },
            compileMatcher : function() {
	            if (this.shouldUseXPath())
		            return this.compileXPathMatcher();
	            var e = this.expression, ps = Selector.patterns, h = Selector.handlers, c = Selector.criteria, le, p, m;
	            if (Selector._cache[e]) {
		            this.matcher = Selector._cache[e];
		            return;
	            }
	            this.matcher = [
	                    "this.matcher = function(root) {",
	                    "var r = root, h = Selector.handlers, c = false, n;"
	            ];
	            while (e && le != e && (/\S/).test(e)) {
		            le = e;
		            for ( var i in ps) {
			            p = ps[i];
			            if (m = e.match(p)) {
				            this.matcher.push(Object.isFunction(c[i]) ? c[i](m)
				                    : new Template(c[i]).evaluate(m));
				            e = e.replace(m[0], '');
				            break;
			            }
		            }
	            }
	            this.matcher.push("return h.unique(n);\n}");
	            eval(this.matcher.join('\n'));
	            Selector._cache[this.expression] = this.matcher;
            },
            compileXPathMatcher : function() {
	            var e = this.expression, ps = Selector.patterns, x = Selector.xpath, le, m;
	            if (Selector._cache[e]) {
		            this.xpath = Selector._cache[e];
		            return;
	            }
	            this.matcher = [
		            './/*'
	            ];
	            while (e && le != e && (/\S/).test(e)) {
		            le = e;
		            for ( var i in ps) {
			            if (m = e.match(ps[i])) {
				            this.matcher.push(Object.isFunction(x[i]) ? x[i](m)
				                    : new Template(x[i]).evaluate(m));
				            e = e.replace(m[0], '');
				            break;
			            }
		            }
	            }
	            this.xpath = this.matcher.join('');
	            Selector._cache[this.expression] = this.xpath;
            },
            findElements : function(root) {
	            root = root || document;
	            if (this.xpath)
		            return document._getElementsByXPath(this.xpath, root);
	            return this.matcher(root);
            },
            match : function(element) {
	            this.tokens = [];
	            var e = this.expression, ps = Selector.patterns, as = Selector.assertions;
	            var le, p, m;
	            while (e && le !== e && (/\S/).test(e)) {
		            le = e;
		            for ( var i in ps) {
			            p = ps[i];
			            if (m = e.match(p)) {
				            if (as[i]) {
					            this.tokens.push( [
					                    i, Object.clone(m)
					            ]);
					            e = e.replace(m[0], '');
				            } else {
					            return this.findElements(document).include(
					                    element);
				            }
			            }
		            }
	            }
	            var match = true, name, matches;
	            for ( var i = 0, token; token = this.tokens[i]; i++) {
		            name = token[0], matches = token[1];
		            if (!Selector.assertions[name](element, matches)) {
			            match = false;
			            break;
		            }
	            }
	            return match;
            },
            toString : function() {
	            return this.expression;
            },
            inspect : function() {
	            return "#<Selector:" + this.expression.inspect() + ">";
            }
        });
Object
        .extend(
                Selector,
                {
                    _cache : {},
                    xpath : {
                        descendant : "//*",
                        child : "/*",
                        adjacent : "/following-sibling::*[1]",
                        laterSibling : '/following-sibling::*',
                        tagName : function(m) {
	                        if (m[1] == '*')
		                        return '';
	                        return "[local-name()='" + m[1].toLowerCase()
	                                + "' or local-name()='"
	                                + m[1].toUpperCase() + "']";
                        },
                        className : "[contains(concat(' ', @class, ' '), ' #{1} ')]",
                        id : "[@id='#{1}']",
                        attrPresence : function(m) {
	                        m[1] = m[1].toLowerCase();
	                        return new Template("[@#{1}]").evaluate(m);
                        },
                        attr : function(m) {
	                        m[1] = m[1].toLowerCase();
	                        m[3] = m[5] || m[6];
	                        return new Template(Selector.xpath.operators[m[2]])
	                                .evaluate(m);
                        },
                        pseudo : function(m) {
	                        var h = Selector.xpath.pseudos[m[1]];
	                        if (!h)
		                        return '';
	                        if (Object.isFunction(h))
		                        return h(m);
	                        return new Template(Selector.xpath.pseudos[m[1]])
	                                .evaluate(m);
                        },
                        operators : {
                            '=' : "[@#{1}='#{3}']",
                            '!=' : "[@#{1}!='#{3}']",
                            '^=' : "[starts-with(@#{1}, '#{3}')]",
                            '$=' : "[substring(@#{1}, (string-length(@#{1}) - string-length('#{3}') + 1))='#{3}']",
                            '*=' : "[contains(@#{1}, '#{3}')]",
                            '~=' : "[contains(concat(' ', @#{1}, ' '), ' #{3} ')]",
                            '|=' : "[contains(concat('-', @#{1}, '-'), '-#{3}-')]"
                        },
                        pseudos : {
                            'first-child' : '[not(preceding-sibling::*)]',
                            'last-child' : '[not(following-sibling::*)]',
                            'only-child' : '[not(preceding-sibling::* or following-sibling::*)]',
                            'empty' : "[count(*) = 0 and (count(text()) = 0 or translate(text(), ' \t\r\n', '') = '')]",
                            'checked' : "[@checked]",
                            'disabled' : "[@disabled]",
                            'enabled' : "[not(@disabled)]",
                            'not' : function(m) {
	                            var e = m[6], p = Selector.patterns, x = Selector.xpath, le, v;
	                            var exclusion = [];
	                            while (e && le != e && (/\S/).test(e)) {
		                            le = e;
		                            for ( var i in p) {
			                            if (m = e.match(p[i])) {
				                            v = Object.isFunction(x[i]) ? x[i]
				                                    (m) : new Template(x[i])
				                                    .evaluate(m);
				                            exclusion
				                                    .push("("
				                                            + v
				                                                    .substring(
				                                                            1,
				                                                            v.length - 1)
				                                            + ")");
				                            e = e.replace(m[0], '');
				                            break;
			                            }
		                            }
	                            }
	                            return "[not(" + exclusion.join(" and ") + ")]";
                            },
                            'nth-child' : function(m) {
	                            return Selector.xpath.pseudos.nth(
	                                    "(count(./preceding-sibling::*) + 1) ",
	                                    m);
                            },
                            'nth-last-child' : function(m) {
	                            return Selector.xpath.pseudos.nth(
	                                    "(count(./following-sibling::*) + 1) ",
	                                    m);
                            },
                            'nth-of-type' : function(m) {
	                            return Selector.xpath.pseudos.nth(
	                                    "position() ", m);
                            },
                            'nth-last-of-type' : function(m) {
	                            return Selector.xpath.pseudos.nth(
	                                    "(last() + 1 - position()) ", m);
                            },
                            'first-of-type' : function(m) {
	                            m[6] = "1";
	                            return Selector.xpath.pseudos['nth-of-type'](m);
                            },
                            'last-of-type' : function(m) {
	                            m[6] = "1";
	                            return Selector.xpath.pseudos['nth-last-of-type']
	                                    (m);
                            },
                            'only-of-type' : function(m) {
	                            var p = Selector.xpath.pseudos;
	                            return p['first-of-type'](m)
	                                    + p['last-of-type'](m);
                            },
                            nth : function(fragment, m) {
	                            var mm, formula = m[6], predicate;
	                            if (formula == 'even')
		                            formula = '2n+0';
	                            if (formula == 'odd')
		                            formula = '2n+1';
	                            if (mm = formula.match(/^(\d+)$/))
		                            return '[' + fragment + "= " + mm[1] + ']';
	                            if (mm = formula
	                                    .match(/^(-?\d*)?n(([+-])(\d+))?/)) {
		                            if (mm[1] == "-")
			                            mm[1] = -1;
		                            var a = mm[1] ? Number(mm[1]) : 1;
		                            var b = mm[2] ? Number(mm[2]) : 0;
		                            predicate = "[((#{fragment} - #{b}) mod #{a} = 0) and "
		                                    + "((#{fragment} - #{b}) div #{a} >= 0)]";
		                            return new Template(predicate).evaluate( {
		                                fragment : fragment,
		                                a : a,
		                                b : b
		                            });
	                            }
                            }
                        }
                    },
                    criteria : {
                        tagName : 'n = h.tagName(n, r, "#{1}", c);      c = false;',
                        className : 'n = h.className(n, r, "#{1}", c);    c = false;',
                        id : 'n = h.id(n, r, "#{1}", c);           c = false;',
                        attrPresence : 'n = h.attrPresence(n, r, "#{1}", c); c = false;',
                        attr : function(m) {
	                        m[3] = (m[5] || m[6]);
	                        return new Template(
	                                'n = h.attr(n, r, "#{1}", "#{3}", "#{2}", c); c = false;')
	                                .evaluate(m);
                        },
                        pseudo : function(m) {
	                        if (m[6])
		                        m[6] = m[6].replace(/"/g, '\\"');
	                        return new Template(
	                                'n = h.pseudo(n, "#{1}", "#{6}", r, c); c = false;')
	                                .evaluate(m);
                        },
                        descendant : 'c = "descendant";',
                        child : 'c = "child";',
                        adjacent : 'c = "adjacent";',
                        laterSibling : 'c = "laterSibling";'
                    },
                    patterns : {
                        laterSibling : /^\s*~\s*/,
                        child : /^\s*>\s*/,
                        adjacent : /^\s*\+\s*/,
                        descendant : /^\s/,
                        tagName : /^\s*(\*|[\w\-]+)(\b|$)?/,
                        id : /^#([\w\-\*]+)(\b|$)/,
                        className : /^\.([\w\-\*]+)(\b|$)/,
                        pseudo : /^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s|[:+~>]))/,
                        attrPresence : /^\[([\w]+)\]/,
                        attr : /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/
                    },
                    assertions : {
                        tagName : function(element, matches) {
	                        return matches[1].toUpperCase() == element.tagName
	                                .toUpperCase();
                        },
                        className : function(element, matches) {
	                        return Element.hasClassName(element, matches[1]);
                        },
                        id : function(element, matches) {
	                        return element.id === matches[1];
                        },
                        attrPresence : function(element, matches) {
	                        return Element.hasAttribute(element, matches[1]);
                        },
                        attr : function(element, matches) {
	                        var nodeValue = Element.readAttribute(element,
	                                matches[1]);
	                        return nodeValue
	                                && Selector.operators[matches[2]]
	                                        (nodeValue, matches[5]
	                                                || matches[6]);
                        }
                    },
                    handlers : {
                        concat : function(a, b) {
	                        for ( var i = 0, node; node = b[i]; i++)
		                        a.push(node);
	                        return a;
                        },
                        mark : function(nodes) {
	                        var _true = Prototype.emptyFunction;
	                        for ( var i = 0, node; node = nodes[i]; i++)
		                        node._countedByPrototype = _true;
	                        return nodes;
                        },
                        unmark : function(nodes) {
	                        for ( var i = 0, node; node = nodes[i]; i++)
		                        node._countedByPrototype = undefined;
	                        return nodes;
                        },
                        index : function(parentNode, reverse, ofType) {
	                        parentNode._countedByPrototype = Prototype.emptyFunction;
	                        if (reverse) {
		                        for ( var nodes = parentNode.childNodes, i = nodes.length - 1, j = 1; i >= 0; i--) {
			                        var node = nodes[i];
			                        if (node.nodeType == 1
			                                && (!ofType || node._countedByPrototype))
				                        node.nodeIndex = j++;
		                        }
	                        } else {
		                        for ( var i = 0, j = 1, nodes = parentNode.childNodes; node = nodes[i]; i++)
			                        if (node.nodeType == 1
			                                && (!ofType || node._countedByPrototype))
				                        node.nodeIndex = j++;
	                        }
                        },
                        unique : function(nodes) {
	                        if (nodes.length == 0)
		                        return nodes;
	                        var results = [], n;
	                        for ( var i = 0, l = nodes.length; i < l; i++)
		                        if (!(n = nodes[i])._countedByPrototype) {
			                        n._countedByPrototype = Prototype.emptyFunction;
			                        results.push(Element.extend(n));
		                        }
	                        return Selector.handlers.unmark(results);
                        },
                        descendant : function(nodes) {
	                        var h = Selector.handlers;
	                        for ( var i = 0, results = [], node; node = nodes[i]; i++)
		                        h.concat(results, node
		                                .getElementsByTagName('*'));
	                        return results;
                        },
                        child : function(nodes) {
	                        var h = Selector.handlers;
	                        for ( var i = 0, results = [], node; node = nodes[i]; i++) {
		                        for ( var j = 0, child; child = node.childNodes[j]; j++)
			                        if (child.nodeType == 1
			                                && child.tagName != '!')
				                        results.push(child);
	                        }
	                        return results;
                        },
                        adjacent : function(nodes) {
	                        for ( var i = 0, results = [], node; node = nodes[i]; i++) {
		                        var next = this.nextElementSibling(node);
		                        if (next)
			                        results.push(next);
	                        }
	                        return results;
                        },
                        laterSibling : function(nodes) {
	                        var h = Selector.handlers;
	                        for ( var i = 0, results = [], node; node = nodes[i]; i++)
		                        h.concat(results, Element.nextSiblings(node));
	                        return results;
                        },
                        nextElementSibling : function(node) {
	                        while (node = node.nextSibling)
		                        if (node.nodeType == 1)
			                        return node;
	                        return null;
                        },
                        previousElementSibling : function(node) {
	                        while (node = node.previousSibling)
		                        if (node.nodeType == 1)
			                        return node;
	                        return null;
                        },
                        tagName : function(nodes, root, tagName, combinator) {
	                        var uTagName = tagName.toUpperCase();
	                        var results = [], h = Selector.handlers;
	                        if (nodes) {
		                        if (combinator) {
			                        if (combinator == "descendant") {
				                        for ( var i = 0, node; node = nodes[i]; i++)
					                        h
					                                .concat(
					                                        results,
					                                        node
					                                                .getElementsByTagName(tagName));
				                        return results;
			                        } else
				                        nodes = this[combinator](nodes);
			                        if (tagName == "*")
				                        return nodes;
		                        }
		                        for ( var i = 0, node; node = nodes[i]; i++)
			                        if (node.tagName.toUpperCase() === uTagName)
				                        results.push(node);
		                        return results;
	                        } else
		                        return root.getElementsByTagName(tagName);
                        },
                        id : function(nodes, root, id, combinator) {
	                        var targetNode = $(id), h = Selector.handlers;
	                        if (!targetNode)
		                        return [];
	                        if (!nodes && root == document)
		                        return [
			                        targetNode
		                        ];
	                        if (nodes) {
		                        if (combinator) {
			                        if (combinator == 'child') {
				                        for ( var i = 0, node; node = nodes[i]; i++)
					                        if (targetNode.parentNode == node)
						                        return [
							                        targetNode
						                        ];
			                        } else if (combinator == 'descendant') {
				                        for ( var i = 0, node; node = nodes[i]; i++)
					                        if (Element.descendantOf(
					                                targetNode, node))
						                        return [
							                        targetNode
						                        ];
			                        } else if (combinator == 'adjacent') {
				                        for ( var i = 0, node; node = nodes[i]; i++)
					                        if (Selector.handlers
					                                .previousElementSibling(targetNode) == node)
						                        return [
							                        targetNode
						                        ];
			                        } else
				                        nodes = h[combinator](nodes);
		                        }
		                        for ( var i = 0, node; node = nodes[i]; i++)
			                        if (node == targetNode)
				                        return [
					                        targetNode
				                        ];
		                        return [];
	                        }
	                        return (targetNode && Element.descendantOf(
	                                targetNode, root)) ? [
		                        targetNode
	                        ] : [];
                        },
                        className : function(nodes, root, className, combinator) {
	                        if (nodes && combinator)
		                        nodes = this[combinator](nodes);
	                        return Selector.handlers.byClassName(nodes, root,
	                                className);
                        },
                        byClassName : function(nodes, root, className) {
	                        if (!nodes)
		                        nodes = Selector.handlers.descendant( [
			                        root
		                        ]);
	                        var needle = ' ' + className + ' ';
	                        for ( var i = 0, results = [], node, nodeClassName; node = nodes[i]; i++) {
		                        nodeClassName = node.className;
		                        if (nodeClassName.length == 0)
			                        continue;
		                        if (nodeClassName == className
		                                || (' ' + nodeClassName + ' ')
		                                        .include(needle))
			                        results.push(node);
	                        }
	                        return results;
                        },
                        attrPresence : function(nodes, root, attr, combinator) {
	                        if (!nodes)
		                        nodes = root.getElementsByTagName("*");
	                        if (nodes && combinator)
		                        nodes = this[combinator](nodes);
	                        var results = [];
	                        for ( var i = 0, node; node = nodes[i]; i++)
		                        if (Element.hasAttribute(node, attr))
			                        results.push(node);
	                        return results;
                        },
                        attr : function(nodes, root, attr, value, operator,
                                combinator) {
	                        if (!nodes)
		                        nodes = root.getElementsByTagName("*");
	                        if (nodes && combinator)
		                        nodes = this[combinator](nodes);
	                        var handler = Selector.operators[operator], results = [];
	                        for ( var i = 0, node; node = nodes[i]; i++) {
		                        var nodeValue = Element.readAttribute(node,
		                                attr);
		                        if (nodeValue === null)
			                        continue;
		                        if (handler(nodeValue, value))
			                        results.push(node);
	                        }
	                        return results;
                        },
                        pseudo : function(nodes, name, value, root, combinator) {
	                        if (nodes && combinator)
		                        nodes = this[combinator](nodes);
	                        if (!nodes)
		                        nodes = root.getElementsByTagName("*");
	                        return Selector.pseudos[name](nodes, value, root);
                        }
                    },
                    pseudos : {
                        'first-child' : function(nodes, value, root) {
	                        for ( var i = 0, results = [], node; node = nodes[i]; i++) {
		                        if (Selector.handlers
		                                .previousElementSibling(node))
			                        continue;
		                        results.push(node);
	                        }
	                        return results;
                        },
                        'last-child' : function(nodes, value, root) {
	                        for ( var i = 0, results = [], node; node = nodes[i]; i++) {
		                        if (Selector.handlers.nextElementSibling(node))
			                        continue;
		                        results.push(node);
	                        }
	                        return results;
                        },
                        'only-child' : function(nodes, value, root) {
	                        var h = Selector.handlers;
	                        for ( var i = 0, results = [], node; node = nodes[i]; i++)
		                        if (!h.previousElementSibling(node)
		                                && !h.nextElementSibling(node))
			                        results.push(node);
	                        return results;
                        },
                        'nth-child' : function(nodes, formula, root) {
	                        return Selector.pseudos.nth(nodes, formula, root);
                        },
                        'nth-last-child' : function(nodes, formula, root) {
	                        return Selector.pseudos.nth(nodes, formula, root,
	                                true);
                        },
                        'nth-of-type' : function(nodes, formula, root) {
	                        return Selector.pseudos.nth(nodes, formula, root,
	                                false, true);
                        },
                        'nth-last-of-type' : function(nodes, formula, root) {
	                        return Selector.pseudos.nth(nodes, formula, root,
	                                true, true);
                        },
                        'first-of-type' : function(nodes, formula, root) {
	                        return Selector.pseudos.nth(nodes, "1", root,
	                                false, true);
                        },
                        'last-of-type' : function(nodes, formula, root) {
	                        return Selector.pseudos.nth(nodes, "1", root, true,
	                                true);
                        },
                        'only-of-type' : function(nodes, formula, root) {
	                        var p = Selector.pseudos;
	                        return p['last-of-type'](p['first-of-type'](nodes,
	                                formula, root), formula, root);
                        },
                        getIndices : function(a, b, total) {
	                        if (a == 0)
		                        return b > 0 ? [
			                        b
		                        ] : [];
	                        return $R(1, total).inject( [], function(memo, i) {
		                        if (0 == (i - b) % a && (i - b) / a >= 0)
			                        memo.push(i);
		                        return memo;
	                        });
                        },
                        nth : function(nodes, formula, root, reverse, ofType) {
	                        if (nodes.length == 0)
		                        return [];
	                        if (formula == 'even')
		                        formula = '2n+0';
	                        if (formula == 'odd')
		                        formula = '2n+1';
	                        var h = Selector.handlers, results = [], indexed = [], m;
	                        h.mark(nodes);
	                        for ( var i = 0, node; node = nodes[i]; i++) {
		                        if (!node.parentNode._countedByPrototype) {
			                        h.index(node.parentNode, reverse, ofType);
			                        indexed.push(node.parentNode);
		                        }
	                        }
	                        if (formula.match(/^\d+$/)) {
		                        formula = Number(formula);
		                        for ( var i = 0, node; node = nodes[i]; i++)
			                        if (node.nodeIndex == formula)
				                        results.push(node);
	                        } else if (m = formula
	                                .match(/^(-?\d*)?n(([+-])(\d+))?/)) {
		                        if (m[1] == "-")
			                        m[1] = -1;
		                        var a = m[1] ? Number(m[1]) : 1;
		                        var b = m[2] ? Number(m[2]) : 0;
		                        var indices = Selector.pseudos.getIndices(a, b,
		                                nodes.length);
		                        for ( var i = 0, node, l = indices.length; node = nodes[i]; i++) {
			                        for ( var j = 0; j < l; j++)
				                        if (node.nodeIndex == indices[j])
					                        results.push(node);
		                        }
	                        }
	                        h.unmark(nodes);
	                        h.unmark(indexed);
	                        return results;
                        },
                        'empty' : function(nodes, value, root) {
	                        for ( var i = 0, results = [], node; node = nodes[i]; i++) {
		                        if (node.tagName == '!'
		                                || (node.firstChild && !node.innerHTML
		                                        .match(/^\s*$/)))
			                        continue;
		                        results.push(node);
	                        }
	                        return results;
                        },
                        'not' : function(nodes, selector, root) {
	                        var h = Selector.handlers, selectorType, m;
	                        var exclusions = new Selector(selector)
	                                .findElements(root);
	                        h.mark(exclusions);
	                        for ( var i = 0, results = [], node; node = nodes[i]; i++)
		                        if (!node._countedByPrototype)
			                        results.push(node);
	                        h.unmark(exclusions);
	                        return results;
                        },
                        'enabled' : function(nodes, value, root) {
	                        for ( var i = 0, results = [], node; node = nodes[i]; i++)
		                        if (!node.disabled)
			                        results.push(node);
	                        return results;
                        },
                        'disabled' : function(nodes, value, root) {
	                        for ( var i = 0, results = [], node; node = nodes[i]; i++)
		                        if (node.disabled)
			                        results.push(node);
	                        return results;
                        },
                        'checked' : function(nodes, value, root) {
	                        for ( var i = 0, results = [], node; node = nodes[i]; i++)
		                        if (node.checked)
			                        results.push(node);
	                        return results;
                        }
                    },
                    operators : {
                        '=' : function(nv, v) {
	                        return nv == v;
                        },
                        '!=' : function(nv, v) {
	                        return nv != v;
                        },
                        '^=' : function(nv, v) {
	                        return nv.startsWith(v);
                        },
                        '$=' : function(nv, v) {
	                        return nv.endsWith(v);
                        },
                        '*=' : function(nv, v) {
	                        return nv.include(v);
                        },
                        '~=' : function(nv, v) {
	                        return (' ' + nv + ' ').include(' ' + v + ' ');
                        },
                        '|=' : function(nv, v) {
	                        return ('-' + nv.toUpperCase() + '-')
	                                .include('-' + v.toUpperCase() + '-');
                        }
                    },
                    split : function(expression) {
	                    var expressions = [];
	                    expression.scan(
	                            /(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/,
	                            function(m) {
		                            expressions.push(m[1].strip());
	                            });
	                    return expressions;
                    },
                    matchElements : function(elements, expression) {
	                    var matches = $$(expression), h = Selector.handlers;
	                    h.mark(matches);
	                    for ( var i = 0, results = [], element; element = elements[i]; i++)
		                    if (element._countedByPrototype)
			                    results.push(element);
	                    h.unmark(matches);
	                    return results;
                    },
                    findElement : function(elements, expression, index) {
	                    if (Object.isNumber(expression)) {
		                    index = expression;
		                    expression = false;
	                    }
	                    return Selector.matchElements(elements,
	                            expression || '*')[index || 0];
                    },
                    findChildElements : function(element, expressions) {
	                    expressions = Selector.split(expressions.join(','));
	                    var results = [], h = Selector.handlers;
	                    for ( var i = 0, l = expressions.length, selector; i < l; i++) {
		                    selector = new Selector(expressions[i].strip());
		                    h.concat(results, selector.findElements(element));
	                    }
	                    return (l > 1) ? h.unique(results) : results;
                    }
                });
if (Prototype.Browser.IE) {
	Object.extend(Selector.handlers, {
	    concat : function(a, b) {
		    for ( var i = 0, node; node = b[i]; i++)
			    if (node.tagName !== "!")
				    a.push(node);
		    return a;
	    },
	    unmark : function(nodes) {
		    for ( var i = 0, node; node = nodes[i]; i++)
			    node.removeAttribute('_countedByPrototype');
		    return nodes;
	    }
	});
}
function $$() {
	return Selector.findChildElements(document, $A(arguments));
}
var Form = {
    reset : function(form) {
	    $(form).reset();
	    return form;
    },
    serializeElements : function(elements, options) {
	    if (typeof options != 'object')
		    options = {
			    hash : !!options
		    };
	    else if (Object.isUndefined(options.hash))
		    options.hash = true;
	    var key, value, submitted = false, submit = options.submit;
	    var data = elements
	            .inject(
	                    {},
	                    function(result, element) {
		                    if (!element.disabled && element.name) {
			                    key = element.name;
			                    value = $(element).getValue();
			                    if (value != null
			                            && (element.type != 'submit' || (!submitted
			                                    && submit !== false
			                                    && (!submit || key == submit) && (submitted = true)))) {
				                    if (key in result) {
					                    if (!Object.isArray(result[key]))
						                    result[key] = [
							                    result[key]
						                    ];
					                    result[key].push(value);
				                    } else
					                    result[key] = value;
			                    }
		                    }
		                    return result;
	                    });
	    return options.hash ? data : Object.toQueryString(data);
    }
};
Form.Methods = {
    serialize : function(form, options) {
	    return Form.serializeElements(Form.getElements(form), options);
    },
    getElements : function(form) {
	    return $A($(form).getElementsByTagName('*')).inject( [],
	            function(elements, child) {
		            if (Form.Element.Serializers[child.tagName.toLowerCase()])
			            elements.push(Element.extend(child));
		            return elements;
	            });
    },
    getInputs : function(form, typeName, name) {
	    form = $(form);
	    var inputs = form.getElementsByTagName('input');
	    if (!typeName && !name)
		    return $A(inputs).map(Element.extend);
	    for ( var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {
		    var input = inputs[i];
		    if ((typeName && input.type != typeName)
		            || (name && input.name != name))
			    continue;
		    matchingInputs.push(Element.extend(input));
	    }
	    return matchingInputs;
    },
    disable : function(form) {
	    form = $(form);
	    Form.getElements(form).invoke('disable');
	    return form;
    },
    enable : function(form) {
	    form = $(form);
	    Form.getElements(form).invoke('enable');
	    return form;
    },
    findFirstElement : function(form) {
	    var elements = $(form).getElements().findAll(function(element) {
		    return 'hidden' != element.type && !element.disabled;
	    });
	    var firstByIndex = elements.findAll(function(element) {
		    return element.hasAttribute('tabIndex') && element.tabIndex >= 0;
	    }).sortBy(function(element) {
		    return element.tabIndex
	    }).first();
	    return firstByIndex ? firstByIndex : elements.find(function(element) {
		    return [
		            'input', 'select', 'textarea'
		    ].include(element.tagName.toLowerCase());
	    });
    },
    focusFirstElement : function(form) {
	    form = $(form);
	    form.findFirstElement().activate();
	    return form;
    },
    request : function(form, options) {
	    form = $(form), options = Object.clone(options || {});
	    var params = options.parameters, action = form.readAttribute('action') || '';
	    if (action.blank())
		    action = window.location.href;
	    options.parameters = form.serialize(true);
	    if (params) {
		    if (Object.isString(params))
			    params = params.toQueryParams();
		    Object.extend(options.parameters, params);
	    }
	    if (form.hasAttribute('method') && !options.method)
		    options.method = form.method;
	    return new Ajax.Request(action, options);
    }
};
Form.Element = {
    focus : function(element) {
	    $(element).focus();
	    return element;
    },
    select : function(element) {
	    $(element).select();
	    return element;
    }
};
Form.Element.Methods = {
    serialize : function(element) {
	    element = $(element);
	    if (!element.disabled && element.name) {
		    var value = element.getValue();
		    if (value != undefined) {
			    var pair = {};
			    pair[element.name] = value;
			    return Object.toQueryString(pair);
		    }
	    }
	    return '';
    },
    getValue : function(element) {
	    element = $(element);
	    var method = element.tagName.toLowerCase();
	    return Form.Element.Serializers[method](element);
    },
    setValue : function(element, value) {
	    element = $(element);
	    var method = element.tagName.toLowerCase();
	    Form.Element.Serializers[method](element, value);
	    return element;
    },
    clear : function(element) {
	    $(element).value = '';
	    return element;
    },
    present : function(element) {
	    return $(element).value != '';
    },
    activate : function(element) {
	    element = $(element);
	    try {
		    element.focus();
		    if (element.select
		            && (element.tagName.toLowerCase() != 'input' || ! [
		                    'button', 'reset', 'submit'
		            ].include(element.type)))
			    element.select();
	    } catch (e) {
	    }
	    return element;
    },
    disable : function(element) {
	    element = $(element);
	    element.blur();
	    element.disabled = true;
	    return element;
    },
    enable : function(element) {
	    element = $(element);
	    element.disabled = false;
	    return element;
    }
};
var Field = Form.Element;
var $F = Form.Element.Methods.getValue;
Form.Element.Serializers = {
    input : function(element, value) {
	    switch (element.type.toLowerCase()) {
		    case 'checkbox':
		    case 'radio':
			    return Form.Element.Serializers.inputSelector(element, value);
		    default:
			    return Form.Element.Serializers.textarea(element, value);
	    }
    },
    inputSelector : function(element, value) {
	    if (Object.isUndefined(value))
		    return element.checked ? element.value : null;
	    else
		    element.checked = !!value;
    },
    textarea : function(element, value) {
	    if (Object.isUndefined(value))
		    return element.value;
	    else
		    element.value = value;
    },
    select : function(element, index) {
	    if (Object.isUndefined(index))
		    return this[element.type == 'select-one' ? 'selectOne'
		            : 'selectMany'](element);
	    else {
		    var opt, value, single = !Object.isArray(index);
		    for ( var i = 0, length = element.length; i < length; i++) {
			    opt = element.options[i];
			    value = this.optionValue(opt);
			    if (single) {
				    if (value == index) {
					    opt.selected = true;
					    return;
				    }
			    } else
				    opt.selected = index.include(value);
		    }
	    }
    },
    selectOne : function(element) {
	    var index = element.selectedIndex;
	    return index >= 0 ? this.optionValue(element.options[index]) : null;
    },
    selectMany : function(element) {
	    var values, length = element.length;
	    if (!length)
		    return null;
	    for ( var i = 0, values = []; i < length; i++) {
		    var opt = element.options[i];
		    if (opt.selected)
			    values.push(this.optionValue(opt));
	    }
	    return values;
    },
    optionValue : function(opt) {
	    return Element.extend(opt).hasAttribute('value') ? opt.value : opt.text;
    }
};
Abstract.TimedObserver = Class
        .create(
                PeriodicalExecuter,
                {
                    initialize : function($super, element, frequency, callback) {
	                    $super(callback, frequency);
	                    this.element = $(element);
	                    this.lastValue = this.getValue();
                    },
                    execute : function() {
	                    var value = this.getValue();
	                    if (Object.isString(this.lastValue)
	                            && Object.isString(value) ? this.lastValue != value
	                            : String(this.lastValue) != String(value)) {
		                    this.callback(this.element, value);
		                    this.lastValue = value;
	                    }
                    }
                });
Form.Element.Observer = Class.create(Abstract.TimedObserver, {
	getValue : function() {
		return Form.Element.getValue(this.element);
	}
});
Form.Observer = Class.create(Abstract.TimedObserver, {
	getValue : function() {
		return Form.serialize(this.element);
	}
});
Abstract.EventObserver = Class.create( {
    initialize : function(element, callback) {
	    this.element = $(element);
	    this.callback = callback;
	    this.lastValue = this.getValue();
	    if (this.element.tagName.toLowerCase() == 'form')
		    this.registerFormCallbacks();
	    else
		    this.registerCallback(this.element);
    },
    onElementEvent : function() {
	    var value = this.getValue();
	    if (this.lastValue != value) {
		    this.callback(this.element, value);
		    this.lastValue = value;
	    }
    },
    registerFormCallbacks : function() {
	    Form.getElements(this.element).each(this.registerCallback, this);
    },
    registerCallback : function(element) {
	    if (element.type) {
		    switch (element.type.toLowerCase()) {
			    case 'checkbox':
			    case 'radio':
				    Event.observe(element, 'click', this.onElementEvent
				            .bind(this));
				    break;
			    default:
				    Event.observe(element, 'change', this.onElementEvent
				            .bind(this));
				    break;
		    }
	    }
    }
});
Form.Element.EventObserver = Class.create(Abstract.EventObserver, {
	getValue : function() {
		return Form.Element.getValue(this.element);
	}
});
Form.EventObserver = Class.create(Abstract.EventObserver, {
	getValue : function() {
		return Form.serialize(this.element);
	}
});
if (!window.Event)
	var Event = {};
Object.extend(Event, {
    KEY_BACKSPACE : 8,
    KEY_TAB : 9,
    KEY_RETURN : 13,
    KEY_ESC : 27,
    KEY_LEFT : 37,
    KEY_UP : 38,
    KEY_RIGHT : 39,
    KEY_DOWN : 40,
    KEY_DELETE : 46,
    KEY_HOME : 36,
    KEY_END : 35,
    KEY_PAGEUP : 33,
    KEY_PAGEDOWN : 34,
    KEY_INSERT : 45,
    cache : {},
    relatedTarget : function(event) {
	    var element;
	    switch (event.type) {
		    case 'mouseover':
			    element = event.fromElement;
			    break;
		    case 'mouseout':
			    element = event.toElement;
			    break;
		    default:
			    return null;
	    }
	    return Element.extend(element);
    }
});
Event.Methods = (function() {
	var isButton;
	if (Prototype.Browser.IE) {
		var buttonMap = {
		    0 : 1,
		    1 : 4,
		    2 : 2
		};
		isButton = function(event, code) {
			return event.button == buttonMap[code];
		};
	} else if (Prototype.Browser.WebKit) {
		isButton = function(event, code) {
			switch (code) {
				case 0:
					return event.which == 1 && !event.metaKey;
				case 1:
					return event.which == 1 && event.metaKey;
				default:
					return false;
			}
		};
	} else {
		isButton = function(event, code) {
			return event.which ? (event.which === code + 1)
			        : (event.button === code);
		};
	}
	return {
	    isLeftClick : function(event) {
		    return isButton(event, 0)
	    },
	    isMiddleClick : function(event) {
		    return isButton(event, 1)
	    },
	    isRightClick : function(event) {
		    return isButton(event, 2)
	    },
	    element : function(event) {
		    var node = Event.extend(event).target;
		    return Element
		            .extend(node.nodeType == Node.TEXT_NODE ? node.parentNode
		                    : node);
	    },
	    findElement : function(event, expression) {
		    var element = Event.element(event);
		    if (!expression)
			    return element;
		    var elements = [
			    element
		    ].concat(element.ancestors());
		    return Selector.findElement(elements, expression, 0);
	    },
	    pointer : function(event) {
		    return {
		        x : event.pageX
		                || (event.clientX + (document.documentElement.scrollLeft || document.body.scrollLeft)),
		        y : event.pageY
		                || (event.clientY + (document.documentElement.scrollTop || document.body.scrollTop))
		    };
	    },
	    pointerX : function(event) {
		    return Event.pointer(event).x
	    },
	    pointerY : function(event) {
		    return Event.pointer(event).y
	    },
	    stop : function(event) {
		    Event.extend(event);
		    event.preventDefault();
		    event.stopPropagation();
		    event.stopped = true;
	    }
	};
})();
Event.extend = (function() {
	var methods = Object.keys(Event.Methods).inject( {}, function(m, name) {
		m[name] = Event.Methods[name].methodize();
		return m;
	});
	if (Prototype.Browser.IE) {
		Object.extend(methods, {
		    stopPropagation : function() {
			    this.cancelBubble = true
		    },
		    preventDefault : function() {
			    this.returnValue = false
		    },
		    inspect : function() {
			    return "[object Event]"
		    }
		});
		return function(event) {
			if (!event)
				return false;
			if (event._extendedByPrototype)
				return event;
			event._extendedByPrototype = Prototype.emptyFunction;
			var pointer = Event.pointer(event);
			Object.extend(event, {
			    target : event.srcElement,
			    relatedTarget : Event.relatedTarget(event),
			    pageX : pointer.x,
			    pageY : pointer.y
			});
			return Object.extend(event, methods);
		};
	} else {
		Event.prototype = Event.prototype
		        || document.createEvent("HTMLEvents").__proto__;
		Object.extend(Event.prototype, methods);
		return Prototype.K;
	}
})();
Object.extend(Event, (function() {
	var cache = Event.cache;
	function getEventID(element) {
		if (element._prototypeEventID)
			return element._prototypeEventID[0];
		arguments.callee.id = arguments.callee.id || 1;
		return element._prototypeEventID = [
			++arguments.callee.id
		];
	}
	function getDOMEventName(eventName) {
		if (eventName && eventName.include(':'))
			return "dataavailable";
		return eventName;
	}
	function getCacheForID(id) {
		return cache[id] = cache[id] || {};
	}
	function getWrappersForEventName(id, eventName) {
		var c = getCacheForID(id);
		return c[eventName] = c[eventName] || [];
	}
	function createWrapper(element, eventName, handler) {
		var id = getEventID(element);
		var c = getWrappersForEventName(id, eventName);
		if (c.pluck("handler").include(handler))
			return false;
		var wrapper = function(event) {
			if (!Event || !Event.extend
			        || (event.eventName && event.eventName != eventName))
				return false;
			Event.extend(event);
			handler.call(element, event);
		};
		wrapper.handler = handler;
		c.push(wrapper);
		return wrapper;
	}
	function findWrapper(id, eventName, handler) {
		var c = getWrappersForEventName(id, eventName);
		return c.find(function(wrapper) {
			return wrapper.handler == handler
		});
	}
	function destroyWrapper(id, eventName, handler) {
		var c = getCacheForID(id);
		if (!c[eventName])
			return false;
		c[eventName] = c[eventName]
		        .without(findWrapper(id, eventName, handler));
	}
	function destroyCache() {
		for ( var id in cache)
			for ( var eventName in cache[id])
				cache[id][eventName] = null;
	}
	if (window.attachEvent) {
		window.attachEvent("onunload", destroyCache);
	}
	return {
	    observe : function(element, eventName, handler) {
		    element = $(element);
		    var name = getDOMEventName(eventName);
		    var wrapper = createWrapper(element, eventName, handler);
		    if (!wrapper)
			    return element;
		    if (element.addEventListener) {
			    element.addEventListener(name, wrapper, false);
		    } else {
			    element.attachEvent("on" + name, wrapper);
		    }
		    return element;
	    },
	    stopObserving : function(element, eventName, handler) {
		    element = $(element);
		    var id = getEventID(element), name = getDOMEventName(eventName);
		    if (!handler && eventName) {
			    getWrappersForEventName(id, eventName).each(function(wrapper) {
				    element.stopObserving(eventName, wrapper.handler);
			    });
			    return element;
		    } else if (!eventName) {
			    Object.keys(getCacheForID(id)).each(function(eventName) {
				    element.stopObserving(eventName);
			    });
			    return element;
		    }
		    var wrapper = findWrapper(id, eventName, handler);
		    if (!wrapper)
			    return element;
		    if (element.removeEventListener) {
			    element.removeEventListener(name, wrapper, false);
		    } else {
			    element.detachEvent("on" + name, wrapper);
		    }
		    destroyWrapper(id, eventName, handler);
		    return element;
	    },
	    fire : function(element, eventName, memo) {
		    element = $(element);
		    if (element == document && document.createEvent
		            && !element.dispatchEvent)
			    element = document.documentElement;
		    var event;
		    if (document.createEvent) {
			    event = document.createEvent("HTMLEvents");
			    event.initEvent("dataavailable", true, true);
		    } else {
			    event = document.createEventObject();
			    event.eventType = "ondataavailable";
		    }
		    event.eventName = eventName;
		    event.memo = memo || {};
		    if (document.createEvent) {
			    element.dispatchEvent(event);
		    } else {
			    element.fireEvent(event.eventType, event);
		    }
		    return Event.extend(event);
	    }
	};
})());
Object.extend(Event, Event.Methods);
Element.addMethods( {
    fire : Event.fire,
    observe : Event.observe,
    stopObserving : Event.stopObserving
});
Object.extend(document, {
    fire : Element.Methods.fire.methodize(),
    observe : Element.Methods.observe.methodize(),
    stopObserving : Element.Methods.stopObserving.methodize(),
    loaded : false
});
(function() {
	var timer;
	function fireContentLoadedEvent() {
		if (document.loaded)
			return;
		if (timer)
			window.clearInterval(timer);
		document.fire("dom:loaded");
		document.loaded = true;
	}
	if (document.addEventListener) {
		if (Prototype.Browser.WebKit) {
			timer = window.setInterval(function() {
				if (/loaded|complete/.test(document.readyState))
					fireContentLoadedEvent();
			}, 0);
			Event.observe(window, "load", fireContentLoadedEvent);
		} else {
			document.addEventListener("DOMContentLoaded",
			        fireContentLoadedEvent, false);
		}
	} else {
		document
		        .write("<script id=__onDOMContentLoaded defer src=//:><\/script>");
		$("__onDOMContentLoaded").onreadystatechange = function() {
			if (this.readyState == "complete") {
				this.onreadystatechange = null;
				fireContentLoadedEvent();
			}
		};
	}
})();
Hash.toQueryString = Object.toQueryString;
var Toggle = {
	display : Element.toggle
};
Element.Methods.childOf = Element.Methods.descendantOf;
var Insertion = {
    Before : function(element, content) {
	    return Element.insert(element, {
		    before : content
	    });
    },
    Top : function(element, content) {
	    return Element.insert(element, {
		    top : content
	    });
    },
    Bottom : function(element, content) {
	    return Element.insert(element, {
		    bottom : content
	    });
    },
    After : function(element, content) {
	    return Element.insert(element, {
		    after : content
	    });
    }
};
var $continue = new Error(
        '"throw $continue" is deprecated, use "return" instead');
var Position = {
    includeScrollOffsets : false,
    prepare : function() {
	    this.deltaX = window.pageXOffset || document.documentElement.scrollLeft
	            || document.body.scrollLeft || 0;
	    this.deltaY = window.pageYOffset || document.documentElement.scrollTop
	            || document.body.scrollTop || 0;
    },
    within : function(element, x, y) {
	    if (this.includeScrollOffsets)
		    return this.withinIncludingScrolloffsets(element, x, y);
	    this.xcomp = x;
	    this.ycomp = y;
	    this.offset = Element.cumulativeOffset(element);
	    return (y >= this.offset[1]
	            && y < this.offset[1] + element.offsetHeight
	            && x >= this.offset[0] && x < this.offset[0]
	            + element.offsetWidth);
    },
    withinIncludingScrolloffsets : function(element, x, y) {
	    var offsetcache = Element.cumulativeScrollOffset(element);
	    this.xcomp = x + offsetcache[0] - this.deltaX;
	    this.ycomp = y + offsetcache[1] - this.deltaY;
	    this.offset = Element.cumulativeOffset(element);
	    return (this.ycomp >= this.offset[1]
	            && this.ycomp < this.offset[1] + element.offsetHeight
	            && this.xcomp >= this.offset[0] && this.xcomp < this.offset[0]
	            + element.offsetWidth);
    },
    overlap : function(mode, element) {
	    if (!mode)
		    return 0;
	    if (mode == 'vertical')
		    return ((this.offset[1] + element.offsetHeight) - this.ycomp)
		            / element.offsetHeight;
	    if (mode == 'horizontal')
		    return ((this.offset[0] + element.offsetWidth) - this.xcomp)
		            / element.offsetWidth;
    },
    cumulativeOffset : Element.Methods.cumulativeOffset,
    positionedOffset : Element.Methods.positionedOffset,
    absolutize : function(element) {
	    Position.prepare();
	    return Element.absolutize(element);
    },
    relativize : function(element) {
	    Position.prepare();
	    return Element.relativize(element);
    },
    realOffset : Element.Methods.cumulativeScrollOffset,
    offsetParent : Element.Methods.getOffsetParent,
    page : Element.Methods.viewportOffset,
    clone : function(source, target, options) {
	    options = options || {};
	    return Element.clonePosition(target, source, options);
    }
};
if (!document.getElementsByClassName)
	document.getElementsByClassName = function(instanceMethods) {
		function iter(name) {
			return name.blank() ? null
			        : "[contains(concat(' ', @class, ' '), ' " + name + " ')]";
		}
		instanceMethods.getElementsByClassName = Prototype.BrowserFeatures.XPath ? function(
		        element, className) {
			className = className.toString().strip();
			var cond = /\s/.test(className) ? $w(className).map(iter).join('')
			        : iter(className);
			return cond ? document._getElementsByXPath('.//*' + cond, element)
			        : [];
		}
		        : function(element, className) {
			        className = className.toString().strip();
			        var elements = [], classNames = (/\s/.test(className) ? $w(className)
			                : null);
			        if (!classNames && !className)
				        return elements;
			        var nodes = $(element).getElementsByTagName('*');
			        className = ' ' + className + ' ';
			        for ( var i = 0, child, cn; child = nodes[i]; i++) {
				        if (child.className
				                && (cn = ' ' + child.className + ' ')
				                && (cn.include(className) || (classNames && classNames
				                        .all(function(name) {
					                        return !name.toString().blank()
					                                && cn
					                                        .include(' ' + name + ' ');
				                        }))))
					        elements.push(Element.extend(child));
			        }
			        return elements;
		        };
		return function(className, parentElement) {
			return $(parentElement || document.body).getElementsByClassName(
			        className);
		};
	}(Element.Methods);
Element.ClassNames = Class.create();
Element.ClassNames.prototype = {
    initialize : function(element) {
	    this.element = $(element);
    },
    _each : function(iterator) {
	    this.element.className.split(/\s+/).select(function(name) {
		    return name.length > 0;
	    })._each(iterator);
    },
    set : function(className) {
	    this.element.className = className;
    },
    add : function(classNameToAdd) {
	    if (this.include(classNameToAdd))
		    return;
	    this.set($A(this).concat(classNameToAdd).join(' '));
    },
    remove : function(classNameToRemove) {
	    if (!this.include(classNameToRemove))
		    return;
	    this.set($A(this).without(classNameToRemove).join(' '));
    },
    toString : function() {
	    return $A(this).join(' ');
    }
};
Object.extend(Element.ClassNames.prototype, Enumerable);
Element.addMethods();