/*  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);

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