/*  Prototype JavaScript framework, version 1.6.1
 *  (c) 2005-2009 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 : '1.6.1',

	Browser : (function() {
		var ua = navigator.userAgent;
		var isOpera = Object.prototype.toString.call(window.opera) == '[object Opera]';
		return {
			IE : !!window.attachEvent && !isOpera,
			Opera : isOpera,
			WebKit : ua.indexOf('AppleWebKit/') > -1,
			Gecko : ua.indexOf('Gecko') > -1 && ua.indexOf('KHTML') === -1,
			MobileSafari : /Apple.*Mobile.*Safari/.test(ua)
		}
	})(),

	BrowserFeatures : {
		XPath : !!document.evaluate,
		SelectorsAPI : !!document.querySelector,
		ElementExtensions : (function() {
			var constructor = window.Element || window.HTMLElement;
			return !!(constructor && constructor.prototype);
		})(),
		SpecificElementExtensions : (function() {
			if (typeof window.HTMLDivElement !== 'undefined')
				return true;

			var div = document.createElement('div');
			var form = document.createElement('form');
			var isSupported = false;

			if (div['__proto__'] && (div['__proto__'] !== form['__proto__'])) {
				isSupported = true;
			}

			div = form = null;

			return isSupported;
		})()
	},

	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 Abstract = {};

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;
	}
};

/* Based on Alex Arnell's inheritance implementation. */

var Class = (function() {
	function subclass() {
	}
	;
	function create() {
		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) {
			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;
	}

	function addMethods(source) {
		var ancestor = this.superclass && this.superclass.prototype;
		var properties = Object.keys(source);

		if (!Object.keys( {
			toString : true
		}).length) {
			if (source.toString != Object.prototype.toString)
				properties.push("toString");
			if (source.valueOf != Object.prototype.valueOf)
				properties.push("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 = (function(m) {
					return function() {
						return ancestor[m].apply(this, arguments);
					};
				})(property).wrap(method);

				value.valueOf = method.valueOf.bind(method);
				value.toString = method.toString.bind(method);
			}
			this.prototype[property] = value;
		}

		return this;
	}

	return {
		create : create,
		Methods : {
			addMethods : addMethods
		}
	};
})();
(function() {

	var _toString = Object.prototype.toString;

	function extend(destination, source) {
		for ( var property in source)
			destination[property] = source[property];
		return destination;
	}

	function inspect(object) {
		try {
			if (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;
		}
	}

	function toJSON(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 (isElement(object))
			return;

		var results = [];
		for ( var property in object) {
			var value = toJSON(object[property]);
			if (!isUndefined(value))
				results.push(property.toJSON() + ': ' + value);
		}

		return '{' + results.join(', ') + '}';
	}

	function toQueryString(object) {
		return $H(object).toQueryString();
	}

	function toHTML(object) {
		return object && object.toHTML ? object.toHTML() : String.interpret(object);
	}

	function keys(object) {
		var results = [];
		for ( var property in object)
			results.push(property);
		return results;
	}

	function values(object) {
		var results = [];
		for ( var property in object)
			results.push(object[property]);
		return results;
	}

	function clone(object) {
		return extend( {}, object);
	}

	function isElement(object) {
		return !!(object && object.nodeType == 1);
	}

	function isArray(object) {
		return _toString.call(object) == "[object Array]";
	}

	function isHash(object) {
		return object instanceof Hash;
	}

	function isFunction(object) {
		return typeof object === "function";
	}

	function isString(object) {
		return _toString.call(object) == "[object String]";
	}

	function isNumber(object) {
		return _toString.call(object) == "[object Number]";
	}

	function isUndefined(object) {
		return typeof object === "undefined";
	}

	extend(Object, {
		extend : extend,
		inspect : inspect,
		toJSON : toJSON,
		toQueryString : toQueryString,
		toHTML : toHTML,
		keys : keys,
		values : values,
		clone : clone,
		isElement : isElement,
		isArray : isArray,
		isHash : isHash,
		isFunction : isFunction,
		isString : isString,
		isNumber : isNumber,
		isUndefined : isUndefined
	});
})();
Object.extend(Function.prototype, (function() {
	var slice = Array.prototype.slice;

	function update(array, args) {
		var arrayLength = array.length, length = args.length;
		while (length--)
			array[arrayLength + length] = args[length];
		return array;
	}

	function merge(array, args) {
		array = slice.call(array, 0);
		return update(array, args);
	}

	function argumentNames() {
		var names = this.toString().match(/^[\s\(]*function[^(]*\(([^)]*)\)/)[1].replace(/\/\/.*?[\r\n]|\/\*(?:.|[\r\n])*?\*\//g, '').replace(/\s+/g, '').split(',');
		return names.length == 1 && !names[0] ? [] : names;
	}

	function bind(context) {
		if (arguments.length < 2 && Object.isUndefined(arguments[0]))
			return this;
		var __method = this, args = slice.call(arguments, 1);
		return function() {
			var a = merge(args, arguments);
			return __method.apply(context, a);
		}
	}

	function bindAsEventListener(context) {
		var __method = this, args = slice.call(arguments, 1);
		return function(event) {
			var a = update( [ event || window.event ], args);
			return __method.apply(context, a);
		}
	}

	function curry() {
		if (!arguments.length)
			return this;
		var __method = this, args = slice.call(arguments, 0);
		return function() {
			var a = merge(args, arguments);
			return __method.apply(this, a);
		}
	}

	function delay(timeout) {
		var __method = this, args = slice.call(arguments, 1);
		timeout = timeout * 1000
		return window.setTimeout(function() {
			return __method.apply(__method, args);
		}, timeout);
	}

	function defer() {
		var args = update( [ 0.01 ], arguments);
		return this.delay.apply(this, args);
	}

	function wrap(wrapper) {
		var __method = this;
		return function() {
			var a = update( [ __method.bind(this) ], arguments);
			return wrapper.apply(this, a);
		}
	}

	function methodize() {
		if (this._methodized)
			return this._methodized;
		var __method = this;
		return this._methodized = function() {
			var a = update( [ this ], arguments);
			return __method.apply(null, a);
		};
	}

	return {
		argumentNames : argumentNames,
		bind : bind,
		bindAsEventListener : bindAsEventListener,
		curry : curry,
		delay : delay,
		defer : defer,
		wrap : wrap,
		methodize : methodize
	}
})());

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"';
};

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();
				this.currentlyExecuting = false;
			} catch (e) {
				this.currentlyExecuting = false;
				throw e;
			}
		}
	}
});
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, (function() {

	function prepareReplacement(replacement) {
		if (Object.isFunction(replacement))
			return replacement;
		var template = new Template(replacement);
		return function(match) {
			return template.evaluate(match)
		};
	}

	function gsub(pattern, replacement) {
		var result = '', source = this, match;
		replacement = prepareReplacement(replacement);

		if (Object.isString(pattern))
			pattern = RegExp.escape(pattern);

		if (!(pattern.length || pattern.source)) {
			replacement = replacement('');
			return replacement + source.split('').join(replacement) + 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;
	}

	function sub(pattern, replacement, count) {
		replacement = prepareReplacement(replacement);
		count = Object.isUndefined(count) ? 1 : count;

		return this.gsub(pattern, function(match) {
			if (--count < 0)
				return match[0];
			return replacement(match);
		});
	}

	function scan(pattern, iterator) {
		this.gsub(pattern, iterator);
		return String(this);
	}

	function truncate(length, truncation) {
		length = length || 30;
		truncation = Object.isUndefined(truncation) ? '...' : truncation;
		return this.length > length ? this.slice(0, length - truncation.length) + truncation : String(this);
	}

	function strip() {
		return this.replace(/^\s+/, '').replace(/\s+$/, '');
	}

	function stripTags() {
		return this.replace(/<\w+(\s+("[^"]*"|'[^']*'|[^>])+)?>|<\/\w+>/gi, '');
	}

	function stripScripts() {
		return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
	}

	function extractScripts() {
		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];
		});
	}

	function evalScripts() {
		return this.extractScripts().map(function(script) {
			return eval(script)
		});
	}

	function escapeHTML() {
		return this.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
	}

	function unescapeHTML() {
		return this.stripTags().replace(/&lt;/g, '<').replace(/&gt;/g, '>').replace(/&amp;/g, '&');
	}

	function toQueryParams(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;
		});
	}

	function toArray() {
		return this.split('');
	}

	function succ() {
		return this.slice(0, this.length - 1) + String.fromCharCode(this.charCodeAt(this.length - 1) + 1);
	}

	function times(count) {
		return count < 1 ? '' : new Array(count + 1).join(this);
	}

	function camelize() {
		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;
	}

	function capitalize() {
		return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
	}

	function underscore() {
		return this.replace(/::/g, '/').replace(/([A-Z]+)([A-Z][a-z])/g, '$1_$2').replace(/([a-z\d])([A-Z])/g, '$1_$2').replace(/-/g, '_').toLowerCase();
	}

	function dasherize() {
		return this.replace(/_/g, '-');
	}

	function inspect(useDoubleQuotes) {
		var escapedString = this.replace(/[\x00-\x1f\\]/g, function(character) {
			if (character in String.specialChar) {
				return String.specialChar[character];
			}
			return '\\u00' + character.charCodeAt().toPaddedString(2, 16);
		});
		if (useDoubleQuotes)
			return '"' + escapedString.replace(/"/g, '\\"') + '"';
		return "'" + escapedString.replace(/'/g, '\\\'') + "'";
	}

	function toJSON() {
		return this.inspect(true);
	}

	function unfilterJSON(filter) {
		return this.replace(filter || Prototype.JSONFilter, '$1');
	}

	function isJSON() {
		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);
	}

	function evalJSON(sanitize) {
		var json = this.unfilterJSON();
		try {
			if (!sanitize || json.isJSON())
				return eval('(' + json + ')');
		} catch (e) {
		}
		throw new SyntaxError('Badly formed JSON string: ' + this.inspect());
	}

	function include(pattern) {
		return this.indexOf(pattern) > -1;
	}

	function startsWith(pattern) {
		return this.indexOf(pattern) === 0;
	}

	function endsWith(pattern) {
		var d = this.length - pattern.length;
		return d >= 0 && this.lastIndexOf(pattern) === d;
	}

	function empty() {
		return this == '';
	}

	function blank() {
		return /^\s*$/.test(this);
	}

	function interpolate(object, pattern) {
		return new Template(this, pattern).evaluate(object);
	}

	return {
		gsub : gsub,
		sub : sub,
		scan : scan,
		truncate : truncate,
		strip : String.prototype.trim ? String.prototype.trim : strip,
		stripTags : stripTags,
		stripScripts : stripScripts,
		extractScripts : extractScripts,
		evalScripts : evalScripts,
		escapeHTML : escapeHTML,
		unescapeHTML : unescapeHTML,
		toQueryParams : toQueryParams,
		parseQuery : toQueryParams,
		toArray : toArray,
		succ : succ,
		times : times,
		camelize : camelize,
		capitalize : capitalize,
		underscore : underscore,
		dasherize : dasherize,
		inspect : inspect,
		toJSON : toJSON,
		unfilterJSON : unfilterJSON,
		isJSON : isJSON,
		evalJSON : evalJSON,
		include : include,
		startsWith : startsWith,
		endsWith : endsWith,
		empty : empty,
		blank : blank,
		interpolate : interpolate
	};
})());

var Template = Class.create( {
	initialize : function(template, pattern) {
		this.template = template.toString();
		this.pattern = pattern || Template.Pattern;
	},

	evaluate : function(object) {
		if (object && Object.isFunction(object.toTemplateReplacements))
			object = object.toTemplateReplacements();

		return this.template.gsub(this.pattern, function(match) {
			if (object == null)
				return (match[1] + '');

			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].replace(/\\\\]/g, ']') : 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 = (function() {
	function each(iterator, context) {
		var index = 0;
		try {
			this._each(function(value) {
				iterator.call(context, value, index++);
			});
		} catch (e) {
			if (e != $break)
				throw e;
		}
		return this;
	}

	function eachSlice(number, iterator, context) {
		var index = -number, slices = [], array = this.toArray();
		if (number < 1)
			return array;
		while ((index += number) < array.length)
			slices.push(array.slice(index, index + number));
		return slices.collect(iterator, context);
	}

	function all(iterator, context) {
		iterator = iterator || Prototype.K;
		var result = true;
		this.each(function(value, index) {
			result = result && !!iterator.call(context, value, index);
			if (!result)
				throw $break;
		});
		return result;
	}

	function any(iterator, context) {
		iterator = iterator || Prototype.K;
		var result = false;
		this.each(function(value, index) {
			if (result = !!iterator.call(context, value, index))
				throw $break;
		});
		return result;
	}

	function collect(iterator, context) {
		iterator = iterator || Prototype.K;
		var results = [];
		this.each(function(value, index) {
			results.push(iterator.call(context, value, index));
		});
		return results;
	}

	function detect(iterator, context) {
		var result;
		this.each(function(value, index) {
			if (iterator.call(context, value, index)) {
				result = value;
				throw $break;
			}
		});
		return result;
	}

	function findAll(iterator, context) {
		var results = [];
		this.each(function(value, index) {
			if (iterator.call(context, value, index))
				results.push(value);
		});
		return results;
	}

	function grep(filter, iterator, context) {
		iterator = iterator || Prototype.K;
		var results = [];

		if (Object.isString(filter))
			filter = new RegExp(RegExp.escape(filter));

		this.each(function(value, index) {
			if (filter.match(value))
				results.push(iterator.call(context, value, index));
		});
		return results;
	}

	function include(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;
	}

	function inGroupsOf(number, fillWith) {
		fillWith = Object.isUndefined(fillWith) ? null : fillWith;
		return this.eachSlice(number, function(slice) {
			while (slice.length < number)
				slice.push(fillWith);
			return slice;
		});
	}

	function inject(memo, iterator, context) {
		this.each(function(value, index) {
			memo = iterator.call(context, memo, value, index);
		});
		return memo;
	}

	function invoke(method) {
		var args = $A(arguments).slice(1);
		return this.map(function(value) {
			return value[method].apply(value, args);
		});
	}

	function max(iterator, context) {
		iterator = iterator || Prototype.K;
		var result;
		this.each(function(value, index) {
			value = iterator.call(context, value, index);
			if (result == null || value >= result)
				result = value;
		});
		return result;
	}

	function min(iterator, context) {
		iterator = iterator || Prototype.K;
		var result;
		this.each(function(value, index) {
			value = iterator.call(context, value, index);
			if (result == null || value < result)
				result = value;
		});
		return result;
	}

	function partition(iterator, context) {
		iterator = iterator || Prototype.K;
		var trues = [], falses = [];
		this.each(function(value, index) {
			(iterator.call(context, value, index) ? trues : falses).push(value);
		});
		return [ trues, falses ];
	}

	function pluck(property) {
		var results = [];
		this.each(function(value) {
			results.push(value[property]);
		});
		return results;
	}

	function reject(iterator, context) {
		var results = [];
		this.each(function(value, index) {
			if (!iterator.call(context, value, index))
				results.push(value);
		});
		return results;
	}

	function sortBy(iterator, context) {
		return this.map(function(value, index) {
			return {
				value : value,
				criteria : iterator.call(context, value, index)
			};
		}).sort(function(left, right) {
			var a = left.criteria, b = right.criteria;
			return a < b ? -1 : a > b ? 1 : 0;
		}).pluck('value');
	}

	function toArray() {
		return this.map();
	}

	function zip() {
		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));
		});
	}

	function size() {
		return this.toArray().length;
	}

	function inspect() {
		return '#<Enumerable:' + this.toArray().inspect() + '>';
	}

	return {
		each : each,
		eachSlice : eachSlice,
		all : all,
		every : all,
		any : any,
		some : any,
		collect : collect,
		map : collect,
		detect : detect,
		findAll : findAll,
		select : findAll,
		filter : findAll,
		grep : grep,
		include : include,
		member : include,
		inGroupsOf : inGroupsOf,
		inject : inject,
		invoke : invoke,
		max : max,
		min : min,
		partition : partition,
		pluck : pluck,
		reject : reject,
		sortBy : sortBy,
		toArray : toArray,
		entries : toArray,
		zip : zip,
		size : size,
		inspect : inspect,
		find : detect
	};
})();
function $A(iterable) {
	if (!iterable)
		return [];
	if ('toArray' in Object(iterable))
		return iterable.toArray();
	var length = iterable.length || 0, results = new Array(length);
	while (length--)
		results[length] = iterable[length];
	return results;
}

function $w(string) {
	if (!Object.isString(string))
		return [];
	string = string.strip();
	return string ? string.split(/\s+/) : [];
}

Array.from = $A;

(function() {
	var arrayProto = Array.prototype, slice = arrayProto.slice, _each = arrayProto.forEach; // use
																							// native
																							// browser
																							// JS
																							// 1.6
																							// implementation
																							// if
																							// available

	function each(iterator) {
		for ( var i = 0, length = this.length; i < length; i++)
			iterator(this[i]);
	}
	if (!_each)
		_each = each;

	function clear() {
		this.length = 0;
		return this;
	}

	function first() {
		return this[0];
	}

	function last() {
		return this[this.length - 1];
	}

	function compact() {
		return this.select(function(value) {
			return value != null;
		});
	}

	function flatten() {
		return this.inject( [], function(array, value) {
			if (Object.isArray(value))
				return array.concat(value.flatten());
			array.push(value);
			return array;
		});
	}

	function without() {
		var values = slice.call(arguments, 0);
		return this.select(function(value) {
			return !values.include(value);
		});
	}

	function reverse(inline) {
		return (inline !== false ? this : this.toArray())._reverse();
	}

	function uniq(sorted) {
		return this.inject( [], function(array, value, index) {
			if (0 == index || (sorted ? array.last() != value : !array.include(value)))
				array.push(value);
			return array;
		});
	}

	function intersect(array) {
		return this.uniq().findAll(function(item) {
			return array.detect(function(value) {
				return item === value
			});
		});
	}

	function clone() {
		return slice.call(this, 0);
	}

	function size() {
		return this.length;
	}

	function inspect() {
		return '[' + this.map(Object.inspect).join(', ') + ']';
	}

	function toJSON() {
		var results = [];
		this.each(function(object) {
			var value = Object.toJSON(object);
			if (!Object.isUndefined(value))
				results.push(value);
		});
		return '[' + results.join(', ') + ']';
	}

	function indexOf(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;
	}

	function lastIndexOf(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;
	}

	function concat() {
		var array = slice.call(this, 0), item;
		for ( var i = 0, length = arguments.length; i < length; i++) {
			item = arguments[i];
			if (Object.isArray(item) && !('callee' in item)) {
				for ( var j = 0, arrayLength = item.length; j < arrayLength; j++)
					array.push(item[j]);
			} else {
				array.push(item);
			}
		}
		return array;
	}

	Object.extend(arrayProto, Enumerable);

	if (!arrayProto._reverse)
		arrayProto._reverse = arrayProto.reverse;

	Object.extend(arrayProto, {
		_each : _each,
		clear : clear,
		first : first,
		last : last,
		compact : compact,
		flatten : flatten,
		without : without,
		reverse : reverse,
		uniq : uniq,
		intersect : intersect,
		clone : clone,
		toArray : clone,
		size : size,
		inspect : inspect,
		toJSON : toJSON
	});

	var CONCAT_ARGUMENTS_BUGGY = (function() {
		return [].concat(arguments)[0][0] !== 1;
	})(1, 2)

	if (CONCAT_ARGUMENTS_BUGGY)
		arrayProto.concat = concat;

	if (!arrayProto.indexOf)
		arrayProto.indexOf = indexOf;
	if (!arrayProto.lastIndexOf)
		arrayProto.lastIndexOf = lastIndexOf;
})();
function $H(object) {
	return new Hash(object);
};

var Hash = Class.create(Enumerable, (function() {
	function initialize(object) {
		this._object = Object.isHash(object) ? object.toObject() : Object.clone(object);
	}

	function _each(iterator) {
		for ( var key in this._object) {
			var value = this._object[key], pair = [ key, value ];
			pair.key = key;
			pair.value = value;
			iterator(pair);
		}
	}

	function set(key, value) {
		return this._object[key] = value;
	}

	function get(key) {
		if (this._object[key] !== Object.prototype[key])
			return this._object[key];
	}

	function unset(key) {
		var value = this._object[key];
		delete this._object[key];
		return value;
	}

	function toObject() {
		return Object.clone(this._object);
	}

	function keys() {
		return this.pluck('key');
	}

	function values() {
		return this.pluck('value');
	}

	function index(value) {
		var match = this.detect(function(pair) {
			return pair.value === value;
		});
		return match && match.key;
	}

	function merge(object) {
		return this.clone().update(object);
	}

	function update(object) {
		return new Hash(object).inject(this, function(result, pair) {
			result.set(pair.key, pair.value);
			return result;
		});
	}

	function toQueryPair(key, value) {
		if (Object.isUndefined(value))
			return key;
		return key + '=' + encodeURIComponent(String.interpret(value));
	}

	function toQueryString() {
		return this.inject( [], function(results, pair) {
			var key = encodeURIComponent(pair.key), values = pair.value;

			if (values && typeof values == 'object') {
				if (Object.isArray(values))
					return results.concat(values.map(toQueryPair.curry(key)));
			} else
				results.push(toQueryPair(key, values));
			return results;
		}).join('&');
	}

	function inspect() {
		return '#<Hash:{' + this.map(function(pair) {
			return pair.map(Object.inspect).join(': ');
		}).join(', ') + '}>';
	}

	function toJSON() {
		return Object.toJSON(this.toObject());
	}

	function clone() {
		return new Hash(this);
	}

	return {
		initialize : initialize,
		_each : _each,
		set : set,
		get : get,
		unset : unset,
		toObject : toObject,
		toTemplateReplacements : toObject,
		keys : keys,
		values : values,
		index : index,
		merge : merge,
		update : update,
		toQueryString : toQueryString,
		inspect : inspect,
		toJSON : toJSON,
		clone : clone
	};
})());

Hash.from = $H;
Object.extend(Number.prototype, (function() {
	function toColorPart() {
		return this.toPaddedString(2, 16);
	}

	function succ() {
		return this + 1;
	}

	function times(iterator, context) {
		$R(0, this, true).each(iterator, context);
		return this;
	}

	function toPaddedString(length, radix) {
		var string = this.toString(radix || 10);
		return '0'.times(length - string.length) + string;
	}

	function toJSON() {
		return isFinite(this) ? this.toString() : 'null';
	}

	function abs() {
		return Math.abs(this);
	}

	function round() {
		return Math.round(this);
	}

	function ceil() {
		return Math.ceil(this);
	}

	function floor() {
		return Math.floor(this);
	}

	return {
		toColorPart : toColorPart,
		succ : succ,
		times : times,
		toPaddedString : toPaddedString,
		toJSON : toJSON,
		abs : abs,
		round : round,
		ceil : ceil,
		floor : floor
	};
})());

function $R(start, end, exclusive) {
	return new ObjectRange(start, end, exclusive);
}

var ObjectRange = Class.create(Enumerable, (function() {
	function initialize(start, end, exclusive) {
		this.start = start;
		this.end = end;
		this.exclusive = exclusive;
	}

	function _each(iterator) {
		var value = this.start;
		while (this.include(value)) {
			iterator(value);
			value = value.succ();
		}
	}

	function include(value) {
		if (value < this.start)
			return false;
		if (this.exclusive)
			return value < this.end;
		return value <= this.end;
	}

	return {
		initialize : initialize,
		_each : _each,
		include : include
	};
})());

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);

			/* Force Firefox to handle ready state 4 for synchronous requests */
			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 : '');

			/*
			 * Force "Connection: close" for older Mozilla browsers to work
			 * around a bug where XMLHttpRequest sends an incorrect
			 * Content-length header. See Mozilla Bugzilla #246651.
			 */
			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(global) {

	var SETATTRIBUTE_IGNORES_NAME = (function() {
		var elForm = document.createElement("form");
		var elInput = document.createElement("input");
		var root = document.documentElement;
		elInput.setAttribute("name", "test");
		elForm.appendChild(elInput);
		root.appendChild(elForm);
		var isBuggy = elForm.elements ? (typeof elForm.elements.test == "undefined") : null;
		root.removeChild(elForm);
		elForm = elInput = null;
		return isBuggy;
	})();

	var element = global.Element;
	global.Element = function(tagName, attributes) {
		attributes = attributes || {};
		tagName = tagName.toLowerCase();
		var cache = Element.cache;
		if (SETATTRIBUTE_IGNORES_NAME && 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(global.Element, element || {});
	if (element)
		global.Element.prototype = element.prototype;
})(this);

Element.cache = {};
Element.idCounter = 1;

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 = $(element);
		element.style.display = 'none';
		return element;
	},

	show : function(element) {
		element = $(element);
		element.style.display = '';
		return element;
	},

	remove : function(element) {
		element = $(element);
		element.parentNode.removeChild(element);
		return element;
	},

	update : (function() {

		var SELECT_ELEMENT_INNERHTML_BUGGY = (function() {
			var el = document.createElement("select"), isBuggy = true;
			el.innerHTML = "<option value=\"test\">test</option>";
			if (el.options && el.options[0]) {
				isBuggy = el.options[0].nodeName.toUpperCase() !== "OPTION";
			}
			el = null;
			return isBuggy;
		})();

		var TABLE_ELEMENT_INNERHTML_BUGGY = (function() {
			try {
				var el = document.createElement("table");
				if (el && el.tBodies) {
					el.innerHTML = "<tbody><tr><td>test</td></tr></tbody>";
					var isBuggy = typeof el.tBodies[0] == "undefined";
					el = null;
					return isBuggy;
				}
			} catch (e) {
				return true;
			}
		})();

		var SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING = (function() {
			var s = document.createElement("script"), isBuggy = false;
			try {
				s.appendChild(document.createTextNode(""));
				isBuggy = !s.firstChild || s.firstChild && s.firstChild.nodeType !== 3;
			} catch (e) {
				isBuggy = true;
			}
			s = null;
			return isBuggy;
		})();

		function update(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 === 'SCRIPT' && SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING) {
				element.text = content;
				return element;
			}

			if (SELECT_ELEMENT_INNERHTML_BUGGY || TABLE_ELEMENT_INNERHTML_BUGGY) {
				if (tagName in Element._insertionTranslations.tags) {
					while (element.firstChild) {
						element.removeChild(element.firstChild);
					}
					Element._getContentFromAnonymousElement(tagName, content.stripScripts()).each(function(node) {
						element.appendChild(node)
					});
				} else {
					element.innerHTML = content.stripScripts();
				}
			} else {
				element.innerHTML = content.stripScripts();
			}

			content.evalScripts.bind(content).defer();
			return element;
		}

		return update;
	})(),

	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(element, 'parentNode');
	},

	descendants : function(element) {
		return Element.select(element, "*");
	},

	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(element, 'previousSibling');
	},

	nextSiblings : function(element) {
		return Element.recursivelyCollect(element, 'nextSibling');
	},

	siblings : function(element) {
		element = $(element);
		return Element.previousSiblings(element).reverse().concat(Element.nextSiblings(element));
	},

	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(element);
		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(element);
		return Object.isNumber(expression) ? Element.descendants(element)[expression] : Element.select(element, expression)[index || 0];
	},

	previous : function(element, expression, index) {
		element = $(element);
		if (arguments.length == 1)
			return $(Selector.handlers.previousElementSibling(element));
		var previousSiblings = Element.previousSiblings(element);
		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(element);
		return Object.isNumber(expression) ? nextSiblings[expression] : Selector.findElement(nextSiblings, expression, index);
	},

	select : function(element) {
		var args = Array.prototype.slice.call(arguments, 1);
		return Selector.findChildElements(element, args);
	},

	adjacent : function(element) {
		var args = Array.prototype.slice.call(arguments, 1);
		return Selector.findChildElements(element.parentNode, args).without(element);
	},

	identify : function(element) {
		element = $(element);
		var id = Element.readAttribute(element, 'id');
		if (id)
			return id;
		do {
			id = 'anonymous_element_' + Element.idCounter++
		} while ($(id));
		Element.writeAttribute(element, '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(element).height;
	},

	getWidth : function(element) {
		return Element.getDimensions(element).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(element, 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(element, className) ? 'removeClassName' : 'addClassName'](element, 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);

		if (element.compareDocumentPosition)
			return (element.compareDocumentPosition(ancestor) & 8) === 8;

		if (ancestor.contains)
			return ancestor.contains(element) && ancestor !== element;

		while (element = element.parentNode)
			if (element == ancestor)
				return true;

		return false;
	},

	scrollTo : function(element) {
		element = $(element);
		var pos = Element.cumulativeOffset(element);
		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 || value == 'auto') {
			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(element, 'display');
		if (display != 'none' && display != null) // Safari bug
		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';
	if (originalPosition != 'fixed') // Switching fixed to absolute causes
										// issues in Safari
		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 (Prototype.Browser.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.toUpperCase() == '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(element, 'position') == 'absolute')
		return element;

	var offsets = Element.positionedOffset(element);
	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(element, 'position') == 'relative')
		return element;

	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 && (element.tagName.toUpperCase() == '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 = Element.viewportOffset(source);

	element = $(element);
	var delta = [ 0, 0 ];
	var parent = null;
	if (Element.getStyle(element, 'position') == 'absolute') {
		parent = Element.getOffsetParent(element);
		delta = Element.viewportOffset(parent);
	}

	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;
}
};

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);
		try {
			element.offsetParent
		} catch (e) {
			return $(document.body)
		}
		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);
			try {
				element.offsetParent
			} catch (e) {
				return Element._returnOffset(0, 0)
			}
			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.cumulativeOffset = Element.Methods.cumulativeOffset.wrap(function(proceed, element) {
		try {
			element.offsetParent
		} catch (e) {
			return Element._returnOffset(0, 0)
		}
		return proceed(element);
	});

	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 = (function() {

		var classProp = 'className';
		var forProp = 'for';

		var el = document.createElement('div');

		el.setAttribute(classProp, 'x');

		if (el.className !== 'x') {
			el.setAttribute('class', 'x');
			if (el.className === 'x') {
				classProp = 'class';
			}
		}
		el = null;

		el = document.createElement('label');
		el.setAttribute(forProp, 'x');
		if (el.htmlFor !== 'x') {
			el.setAttribute('htmlFor', 'x');
			if (el.htmlFor === 'x') {
				forProp = 'htmlFor';
			}
		}
		el = null;

		return {
			read : {
				names : {
					'class' : classProp,
					'className' : classProp,
					'for' : forProp,
					'htmlFor' : forProp
				},
				values : {
					_getAttr : function(element, attribute) {
						return element.getAttribute(attribute);
					},
					_getAttr2 : function(element, attribute) {
						return element.getAttribute(attribute, 2);
					},
					_getAttrNode : function(element, attribute) {
						var node = element.getAttributeNode(attribute);
						return node ? node.value : "";
					},
					_getEv : (function() {

						var el = document.createElement('div');
						el.onclick = Prototype.emptyFunction;
						var value = el.getAttribute('onclick');
						var f;

						if (String(value).indexOf('{') > -1) {
							f = function(element, attribute) {
								attribute = element.getAttribute(attribute);
								if (!attribute)
									return null;
								attribute = attribute.toString();
								attribute = attribute.split('{')[1];
								attribute = attribute.split('}')[0];
								return attribute.strip();
							};
						} else if (value === '') {
							f = function(element, attribute) {
								attribute = element.getAttribute(attribute);
								if (!attribute)
									return null;
								return attribute.strip();
							};
						}
						el = null;
						return f;
					})(),
					_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 frameBorder').each(function(attr) {
		Element._attributeTranslations.write.names[attr.toLowerCase()] = attr;
		Element._attributeTranslations.has[attr.toLowerCase()] = attr;
	});

	(function(v) {
		Object.extend(v, {
			href : v._getAttr2,
			src : v._getAttr2,
			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);

	if (Prototype.BrowserFeatures.ElementExtensions) {
		(function() {
			function _descendants(element) {
				var nodes = element.getElementsByTagName('*'), results = [];
				for ( var i = 0, node; node = nodes[i]; i++)
					if (node.tagName !== "!") // Filter out comment nodes.
						results.push(node);
				return results;
			}

			Element.Methods.down = function(element, expression, index) {
				element = $(element);
				if (arguments.length == 1)
					return element.firstDescendant();
				return Object.isNumber(expression) ? _descendants(element)[expression] : Element.select(element, expression)[index || 0];
			}
		})();
	}

}

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.toUpperCase() == '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 ('outerHTML' in document.documentElement) {
	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() {
	var tags = Element._insertionTranslations.tags;
	Object.extend(tags, {
		THEAD : tags.TBODY,
		TFOOT : tags.TBODY,
		TH : tags.TD
	});
})();

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);

(function(div) {

	if (!Prototype.BrowserFeatures.ElementExtensions && div['__proto__']) {
		window.HTMLElement = {};
		window.HTMLElement.prototype = div['__proto__'];
		Prototype.BrowserFeatures.ElementExtensions = true;
	}

	div = null;

})(document.createElement('div'))

Element.extend = (function() {

	function checkDeficiency(tagName) {
		if (typeof window.Element != 'undefined') {
			var proto = window.Element.prototype;
			if (proto) {
				var id = '_' + (Math.random() + '').slice(2);
				var el = document.createElement(tagName);
				proto[id] = 'x';
				var isBuggy = (el[id] !== 'x');
				delete proto[id];
				el = null;
				return isBuggy;
			}
		}
		return false;
	}

	function extendElementWith(element, methods) {
		for ( var property in methods) {
			var value = methods[property];
			if (Object.isFunction(value) && !(property in element))
				element[property] = value.methodize();
		}
	}

	var HTMLOBJECTELEMENT_PROTOTYPE_BUGGY = checkDeficiency('object');

	if (Prototype.BrowserFeatures.SpecificElementExtensions) {
		if (HTMLOBJECTELEMENT_PROTOTYPE_BUGGY) {
			return function(element) {
				if (element && typeof element._extendedByPrototype == 'undefined') {
					var t = element.tagName;
					if (t && (/^(?:object|applet|embed)$/i.test(t))) {
						extendElementWith(element, Element.Methods);
						extendElementWith(element, Element.Methods.Simulated);
						extendElementWith(element, Element.Methods.ByTag[t.toUpperCase()]);
					}
				}
				return element;
			}
		}
		return Prototype.K;
	}

	var Methods = {}, ByTag = Element.Methods.ByTag;

	var extend = Object.extend(function(element) {
		if (!element || typeof element._extendedByPrototype != 'undefined' || element.nodeType != 1 || element == window)
			return element;

		var methods = Object.clone(Methods), tagName = element.tagName.toUpperCase();

		if (ByTag[tagName])
			Object.extend(methods, ByTag[tagName]);

		extendElementWith(element, methods);

		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];

		var element = document.createElement(tagName);
		var proto = element['__proto__'] || element.constructor.prototype;
		element = null;
		return proto;
	}

	var elementPrototype = window.HTMLElement ? HTMLElement.prototype : Element.prototype;

	if (F.ElementExtensions) {
		copy(Element.Methods, elementPrototype);
		copy(Element.Methods.Simulated, elementPrototype, 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() {
		return {
			width : this.getWidth(),
			height : this.getHeight()
		};
	},

	getScrollOffsets : function() {
		return Element._returnOffset(window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft, window.pageYOffset || document.documentElement.scrollTop
				|| document.body.scrollTop);
	}
};

(function(viewport) {
	var B = Prototype.Browser, doc = document, element, property = {};

	function getRootElement() {
		if (B.WebKit && !doc.evaluate)
			return document;

		if (B.Opera && window.parseFloat(window.opera.version()) < 9.5)
			return document.body;

		return document.documentElement;
	}

	function define(D) {
		if (!element)
			element = getRootElement();

		property[D] = 'client' + D;

		viewport['get' + D] = function() {
			return element[property[D]]
		};
		return viewport['get' + D]();
	}

	viewport.getWidth = define.curry('Width');

	viewport.getHeight = define.curry('Height');
})(document.viewport);

Element.Storage = {
	UID : 1
};

Element.addMethods( {
	getStorage : function(element) {
		if (!(element = $(element)))
			return;

		var uid;
		if (element === window) {
			uid = 0;
		} else {
			if (typeof element._prototypeUID === "undefined")
				element._prototypeUID = [ Element.Storage.UID++ ];
			uid = element._prototypeUID[0];
		}

		if (!Element.Storage[uid])
			Element.Storage[uid] = $H();

		return Element.Storage[uid];
	},

	store : function(element, key, value) {
		if (!(element = $(element)))
			return;

		if (arguments.length === 2) {
			Element.getStorage(element).update(key);
		} else {
			Element.getStorage(element).set(key, value);
		}

		return element;
	},

	retrieve : function(element, key, defaultValue) {
		if (!(element = $(element)))
			return;
		var hash = Element.getStorage(element), value = hash.get(key);

		if (Object.isUndefined(value)) {
			hash.set(key, defaultValue);
			value = defaultValue;
		}

		return value;
	},

	clone : function(element, deep) {
		if (!(element = $(element)))
			return;
		var clone = element.cloneNode(deep);
		clone._prototypeUID = void 0;
		if (deep) {
			var descendants = Element.select(clone, '*'), i = descendants.length;
			while (i--) {
				descendants[i]._prototypeUID = void 0;
			}
		}
		return Element.extend(clone);
	}
});
/*
 * Portions of the Selector class are derived from Jack Slocum's DomQuery, part
 * of YUI-Ext version 0.40, distributed under the terms of an MIT-style license.
 * Please see http://www.yui-ext.com/ for more information.
 */

var Selector = Class.create( {
	initialize : function(expression) {
		this.expression = expression.strip();

		if (this.shouldUseSelectorsAPI()) {
			this.mode = 'selectorsAPI';
		} else if (this.shouldUseXPath()) {
			this.mode = 'xpath';
			this.compileXPathMatcher();
		} else {
			this.mode = "normal";
			this.compileMatcher();
		}

	},

	shouldUseXPath : (function() {

		var IS_DESCENDANT_SELECTOR_BUGGY = (function() {
			var isBuggy = false;
			if (document.evaluate && window.XPathResult) {
				var el = document.createElement('div');
				el.innerHTML = '<ul><li></li></ul><div><ul><li></li></ul></div>';

				var xpath = ".//*[local-name()='ul' or local-name()='UL']" + "//*[local-name()='li' or local-name()='LI']";

				var result = document.evaluate(xpath, el, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);

				isBuggy = (result.snapshotLength !== 2);
				el = null;
			}
			return isBuggy;
		})();

		return 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(e))
				return false;

			if (IS_DESCENDANT_SELECTOR_BUGGY)
				return false;

			return true;
		}

	})(),

	shouldUseSelectorsAPI : function() {
		if (!Prototype.BrowserFeatures.SelectorsAPI)
			return false;

		if (Selector.CASE_INSENSITIVE_CLASS_NAMES)
			return false;

		if (!Selector._div)
			Selector._div = new Element('div');

		try {
			Selector._div.querySelector(this.expression);
		} catch (e) {
			return false;
		}

		return true;
	},

	compileMatcher : function() {
		var e = this.expression, ps = Selector.patterns, h = Selector.handlers, c = Selector.criteria, le, p, m, len = ps.length, name;

		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 = 0; i < len; i++) {
				p = ps[i].re;
				name = ps[i].name;
				if (m = e.match(p)) {
					this.matcher.push(Object.isFunction(c[name]) ? c[name](m) : new Template(c[name]).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, len = ps.length, name;

		if (Selector._cache[e]) {
			this.xpath = Selector._cache[e];
			return;
		}

		this.matcher = [ './/*' ];
		while (e && le != e && (/\S/).test(e)) {
			le = e;
			for ( var i = 0; i < len; i++) {
				name = ps[i].name;
				if (m = e.match(ps[i].re)) {
					this.matcher.push(Object.isFunction(x[name]) ? x[name](m) : new Template(x[name]).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;
		var e = this.expression, results;

		switch (this.mode) {
		case 'selectorsAPI':
			if (root !== document) {
				var oldId = root.id, id = $(root).identify();
				id = id.replace(/([\.:])/g, "\\$1");
				e = "#" + id + " " + e;
			}

			results = $A(root.querySelectorAll(e)).map(Element.extend);
			root.id = oldId;

			return results;
		case 'xpath':
			return document._getElementsByXPath(this.xpath, root);
		default:
			return this.matcher(root);
		}
	},

	match : function(element) {
		this.tokens = [];

		var e = this.expression, ps = Selector.patterns, as = Selector.assertions;
		var le, p, m, len = ps.length, name;

		while (e && le !== e && (/\S/).test(e)) {
			le = e;
			for ( var i = 0; i < len; i++) {
				p = ps[i].re;
				name = ps[i].name;
				if (m = e.match(p)) {
					if (as[name]) {
						this.tokens.push( [ name, 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() + ">";
	}
});

if (Prototype.BrowserFeatures.SelectorsAPI && document.compatMode === 'BackCompat') {
	Selector.CASE_INSENSITIVE_CLASS_NAMES = (function() {
		var div = document.createElement('div'), span = document.createElement('span');

		div.id = "prototype_test_id";
		span.className = 'Test';
		div.appendChild(span);
		var isIgnored = (div.querySelector('#prototype_test_id .test') !== null);
		div = span = null;
		return isIgnored;
	})();
}

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)]",
			'checked' : "[@checked]",
			'disabled' : "[(@disabled) and (@type!='hidden')]",
			'enabled' : "[not(@disabled) and (@type!='hidden')]",
			'not' : function(m) {
				var e = m[6], p = Selector.patterns, x = Selector.xpath, le, v, len = p.length, name;

				var exclusion = [];
				while (e && le != e && (/\S/).test(e)) {
					le = e;
					for ( var i = 0; i < len; i++) {
						name = p[i].name
						if (m = e.match(p[i].re)) {
							v = Object.isFunction(x[name]) ? x[name](m) : new Template(x[name]).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+)$/)) // digit only
				return '[' + fragment + "= " + mm[1] + ']';
			if (mm = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
				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 : [ {
		name : 'laterSibling',
		re : /^\s*~\s*/
	}, {
		name : 'child',
		re : /^\s*>\s*/
	}, {
		name : 'adjacent',
		re : /^\s*\+\s*/
	}, {
		name : 'descendant',
		re : /^\s/
	},

	{
		name : 'tagName',
		re : /^\s*(\*|[\w\-]+)(\b|$)?/
	}, {
		name : 'id',
		re : /^#([\w\-\*]+)(\b|$)/
	}, {
		name : 'className',
		re : /^\.([\w\-\*]+)(\b|$)/
	}, {
		name : 'pseudo',
		re : /^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s|[:+~>]))/
	}, {
		name : 'attrPresence',
		re : /^\[((?:[\w-]+:)?[\w-]+)\]/
	}, {
		name : 'attr',
		re : /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/
	} ],

	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() {

			var PROPERTIES_ATTRIBUTES_MAP = (function() {
				var el = document.createElement('div'), isBuggy = false, propName = '_countedByPrototype', value = 'x'
				el[propName] = value;
				isBuggy = (el.getAttribute(propName) === value);
				el = null;
				return isBuggy;
			})();

			return PROPERTIES_ATTRIBUTES_MAP ? function(nodes) {
				for ( var i = 0, node; node = nodes[i]; i++)
					node.removeAttribute('_countedByPrototype');
				return nodes;
			} : function(nodes) {
				for ( var i = 0, node; node = nodes[i]; i++)
					node._countedByPrototype = void 0;
				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 (typeof (n = nodes[i])._countedByPrototype == 'undefined') {
					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 (root == document) {
				if (!targetNode)
					return [];
				if (!nodes)
					return [ targetNode ];
			} else {
				if (!root.sourceIndex || root.sourceIndex < 1) {
					var nodes = root.getElementsByTagName('*');
					for ( var j = 0, node; node = nodes[j]; j++) {
						if (node.id === id)
							return [ node ];
					}
				}
			}

			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+$/)) { // just a number
			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+))?/)) { // an+b
			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)
				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 && (!node.type || node.type !== 'hidden'))
				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 == v || nv && nv.startsWith(v);
		},
		'$=' : function(nv, v) {
			return nv == v || nv && nv.endsWith(v);
		},
		'*=' : function(nv, v) {
			return nv == v || nv && 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;
		}
	});
}

function $$() {
	return Selector.findChildElements(document, $A(arguments));
}

var Form = {
	reset : function(form) {
		form = $(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 != 'file' && (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) {
		var elements = $(form).getElementsByTagName('*'), element, arr = [], serializers = Form.Element.Serializers;
		for ( var i = 0; element = elements[i]; i++) {
			arr.push(element);
		}
		return arr.inject( [], function(elements, child) {
			if (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)$/i.test(element.tagName);
		});
	},

	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 = $(element);
		try {
			element.focus();
			if (element.select && (element.tagName.toLowerCase() != 'input' || !(/^(?:button|reset|submit)$/i.test(element.type))))
				element.select();
		} catch (e) {
		}
		return element;
	},

	disable : function(element) {
		element = $(element);
		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, value) {
		if (Object.isUndefined(value))
			return this[element.type == 'select-one' ? 'selectOne' : 'selectMany'](element);
		else {
			var opt, currentValue, single = !Object.isArray(value);
			for ( var i = 0, length = element.length; i < length; i++) {
				opt = element.options[i];
				currentValue = this.optionValue(opt);
				if (single) {
					if (currentValue == value) {
						opt.selected = true;
						return;
					}
				} else
					opt.selected = value.include(currentValue);
			}
		}
	},

	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);
	}
});
(function() {

	var 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 : {}
	};

	var docEl = document.documentElement;
	var MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED = 'onmouseenter' in docEl && 'onmouseleave' in docEl;

	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);
		};
	}

	function isLeftClick(event) {
		return _isButton(event, 0)
	}

	function isMiddleClick(event) {
		return _isButton(event, 1)
	}

	function isRightClick(event) {
		return _isButton(event, 2)
	}

	function element(event) {
		event = Event.extend(event);

		var node = event.target, type = event.type, currentTarget = event.currentTarget;

		if (currentTarget && currentTarget.tagName) {
			if (type === 'load' || type === 'error' || (type === 'click' && currentTarget.tagName.toLowerCase() === 'input' && currentTarget.type === 'radio'))
				node = currentTarget;
		}

		if (node.nodeType == Node.TEXT_NODE)
			node = node.parentNode;

		return Element.extend(node);
	}

	function findElement(event, expression) {
		var element = Event.element(event);
		if (!expression)
			return element;
		var elements = [ element ].concat(element.ancestors());
		return Selector.findElement(elements, expression, 0);
	}

	function pointer(event) {
		return {
			x : pointerX(event),
			y : pointerY(event)
		};
	}

	function pointerX(event) {
		var docElement = document.documentElement, body = document.body || {
			scrollLeft : 0
		};

		return event.pageX || (event.clientX + (docElement.scrollLeft || body.scrollLeft) - (docElement.clientLeft || 0));
	}

	function pointerY(event) {
		var docElement = document.documentElement, body = document.body || {
			scrollTop : 0
		};

		return event.pageY || (event.clientY + (docElement.scrollTop || body.scrollTop) - (docElement.clientTop || 0));
	}

	function stop(event) {
		Event.extend(event);
		event.preventDefault();
		event.stopPropagation();

		event.stopped = true;
	}

	Event.Methods = {
		isLeftClick : isLeftClick,
		isMiddleClick : isMiddleClick,
		isRightClick : isRightClick,

		element : element,
		findElement : findElement,

		pointer : pointer,
		pointerX : pointerX,
		pointerY : pointerY,

		stop : stop
	};

	var methods = Object.keys(Event.Methods).inject( {}, function(m, name) {
		m[name] = Event.Methods[name].methodize();
		return m;
	});

	if (Prototype.Browser.IE) {
		function _relatedTarget(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);
		}

		Object.extend(methods, {
			stopPropagation : function() {
				this.cancelBubble = true
			},
			preventDefault : function() {
				this.returnValue = false
			},
			inspect : function() {
				return '[object Event]'
			}
		});

		Event.extend = function(event, element) {
			if (!event)
				return false;
			if (event._extendedByPrototype)
				return event;

			event._extendedByPrototype = Prototype.emptyFunction;
			var pointer = Event.pointer(event);

			Object.extend(event, {
				target : event.srcElement || element,
				relatedTarget : _relatedTarget(event),
				pageX : pointer.x,
				pageY : pointer.y
			});

			return Object.extend(event, methods);
		};
	} else {
		Event.prototype = window.Event.prototype || document.createEvent('HTMLEvents').__proto__;
		Object.extend(Event.prototype, methods);
		Event.extend = Prototype.K;
	}

	function _createResponder(element, eventName, handler) {
		var registry = Element.retrieve(element, 'prototype_event_registry');

		if (Object.isUndefined(registry)) {
			CACHE.push(element);
			registry = Element.retrieve(element, 'prototype_event_registry', $H());
		}

		var respondersForEvent = registry.get(eventName);
		if (Object.isUndefined(respondersForEvent)) {
			respondersForEvent = [];
			registry.set(eventName, respondersForEvent);
		}

		if (respondersForEvent.pluck('handler').include(handler))
			return false;

		var responder;
		if (eventName.include(":")) {
			responder = function(event) {
				if (Object.isUndefined(event.eventName))
					return false;

				if (event.eventName !== eventName)
					return false;

				Event.extend(event, element);
				handler.call(element, event);
			};
		} else {
			if (!MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED && (eventName === "mouseenter" || eventName === "mouseleave")) {
				if (eventName === "mouseenter" || eventName === "mouseleave") {
					responder = function(event) {
						Event.extend(event, element);

						var parent = event.relatedTarget;
						while (parent && parent !== element) {
							try {
								parent = parent.parentNode;
							} catch (e) {
								parent = element;
							}
						}

						if (parent === element)
							return;

						handler.call(element, event);
					};
				}
			} else {
				responder = function(event) {
					Event.extend(event, element);
					handler.call(element, event);
				};
			}
		}

		responder.handler = handler;
		respondersForEvent.push(responder);
		return responder;
	}

	function _destroyCache() {
		for ( var i = 0, length = CACHE.length; i < length; i++) {
			Event.stopObserving(CACHE[i]);
			CACHE[i] = null;
		}
	}

	var CACHE = [];

	if (Prototype.Browser.IE)
		window.attachEvent('onunload', _destroyCache);

	if (Prototype.Browser.WebKit)
		window.addEventListener('unload', Prototype.emptyFunction, false);

	var _getDOMEventName = Prototype.K;

	if (!MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED) {
		_getDOMEventName = function(eventName) {
			var translations = {
				mouseenter : "mouseover",
				mouseleave : "mouseout"
			};
			return eventName in translations ? translations[eventName] : eventName;
		};
	}

	function observe(element, eventName, handler) {
		element = $(element);

		var responder = _createResponder(element, eventName, handler);

		if (!responder)
			return element;

		if (eventName.include(':')) {
			if (element.addEventListener)
				element.addEventListener("dataavailable", responder, false);
			else {
				element.attachEvent("ondataavailable", responder);
				element.attachEvent("onfilterchange", responder);
			}
		} else {
			var actualEventName = _getDOMEventName(eventName);

			if (element.addEventListener)
				element.addEventListener(actualEventName, responder, false);
			else
				element.attachEvent("on" + actualEventName, responder);
		}

		return element;
	}

	function stopObserving(element, eventName, handler) {
		element = $(element);

		var registry = Element.retrieve(element, 'prototype_event_registry');

		if (Object.isUndefined(registry))
			return element;

		if (eventName && !handler) {
			var responders = registry.get(eventName);

			if (Object.isUndefined(responders))
				return element;

			responders.each(function(r) {
				Element.stopObserving(element, eventName, r.handler);
			});
			return element;
		} else if (!eventName) {
			registry.each(function(pair) {
				var eventName = pair.key, responders = pair.value;

				responders.each(function(r) {
					Element.stopObserving(element, eventName, r.handler);
				});
			});
			return element;
		}

		var responders = registry.get(eventName);

		if (!responders)
			return;

		var responder = responders.find(function(r) {
			return r.handler === handler;
		});
		if (!responder)
			return element;

		var actualEventName = _getDOMEventName(eventName);

		if (eventName.include(':')) {
			if (element.removeEventListener)
				element.removeEventListener("dataavailable", responder, false);
			else {
				element.detachEvent("ondataavailable", responder);
				element.detachEvent("onfilterchange", responder);
			}
		} else {
			if (element.removeEventListener)
				element.removeEventListener(actualEventName, responder, false);
			else
				element.detachEvent('on' + actualEventName, responder);
		}

		registry.set(eventName, responders.without(responder));

		return element;
	}

	function fire(element, eventName, memo, bubble) {
		element = $(element);

		if (Object.isUndefined(bubble))
			bubble = true;

		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 = bubble ? 'ondataavailable' : 'onfilterchange';
		}

		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);

	Object.extend(Event, {
		fire : fire,
		observe : observe,
		stopObserving : stopObserving
	});

	Element.addMethods( {
		fire : fire,

		observe : observe,

		stopObserving : stopObserving
	});

	Object.extend(document, {
		fire : fire.methodize(),

		observe : observe.methodize(),

		stopObserving : stopObserving.methodize(),

		loaded : false
	});

	if (window.Event)
		Object.extend(window.Event, Event);
	else
		window.Event = Event;
})();

(function() {
	/*
	 * Support for the DOMContentLoaded event is based on work by Dan Webb,
	 * Matthias Miller, Dean Edwards, John Resig, and Diego Perini.
	 */

	var timer;

	function fireContentLoadedEvent() {
		if (document.loaded)
			return;
		if (timer)
			window.clearTimeout(timer);
		document.loaded = true;
		document.fire('dom:loaded');
	}

	function checkReadyState() {
		if (document.readyState === 'complete') {
			document.stopObserving('readystatechange', checkReadyState);
			fireContentLoadedEvent();
		}
	}

	function pollDoScroll() {
		try {
			document.documentElement.doScroll('left');
		} catch (e) {
			timer = pollDoScroll.defer();
			return;
		}
		fireContentLoadedEvent();
	}

	if (document.addEventListener) {
		document.addEventListener('DOMContentLoaded', fireContentLoadedEvent, false);
	} else {
		document.observe('readystatechange', checkReadyState);
		if (window == top)
			timer = pollDoScroll.defer();
	}

	Event.observe(window, 'load', fireContentLoadedEvent);
})();

Element.addMethods();

/*------------------------------- DEPRECATED -------------------------------*/

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);

/*--------------------------------------------------------------------------*/