jquery.js

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	 *
	 * @name $.noConflict
	 * @type undefined
	 * @cat Core 
	 */
	noConflict: function() {
		if ( jQuery._$ )
			$ = jQuery._$;
		return jQuery;
	},

	// This may seem like some crazy code, but trust me when I say that this
	// is the only cross-browser way to do this. --John
	isFunction: function( fn ) {
		return !!fn && typeof fn != "string" && !fn.nodeName && 
			fn.constructor != Array && /function/i.test( fn + "" );
	},
	
	// check if an element is in a XML document
	isXMLDoc: function(elem) {
		return elem.tagName && elem.ownerDocument && !elem.ownerDocument.body;
	},

	nodeName: function( elem, name ) {
		return elem.nodeName && elem.nodeName.toUpperCase() == name.toUpperCase();
	},

	/**
	 * A generic iterator function, which can be used to seamlessly
	 * iterate over both objects and arrays. This function is not the same
	 * as $().each() - which is used to iterate, exclusively, over a jQuery
	 * object. This function can be used to iterate over anything.
	 *
	 * The callback has two arguments:the key (objects) or index (arrays) as first
	 * the first, and the value as the second.
	 *
	 * @example $.each( [0,1,2], function(i, n){
	 *   alert( "Item #" + i + ": " + n );
	 * });
	 * @desc This is an example of iterating over the items in an array,
	 * accessing both the current item and its index.
	 *
	 * @example $.each( { name: "John", lang: "JS" }, function(i, n){
	 *   alert( "Name: " + i + ", Value: " + n );
	 * });
	 *
	 * @desc This is an example of iterating over the properties in an
	 * Object, accessing both the current item and its key.
	 *
	 * @name $.each
	 * @param Object obj The object, or array, to iterate over.
	 * @param Function fn The function that will be executed on every object.
	 * @type Object
	 * @cat JavaScript
	 */
	// args is for internal usage only
	each: function( obj, fn, args ) {
		if ( obj.length == undefined )
			for ( var i in obj )
				fn.apply( obj[i], args || [i, obj[i]] );
		else
			for ( var i = 0, ol = obj.length; i < ol; i++ )
				if ( fn.apply( obj[i], args || [i, obj[i]] ) === false ) break;
		return obj;
	},
	
	prop: function(elem, value, type, index, prop){
			// Handle executable functions
			if ( jQuery.isFunction( value ) )
				value = value.call( elem, [index] );
				
			// exclude the following css properties to add px
			var exclude = /z-?index|font-?weight|opacity|zoom|line-?height/i;

			// Handle passing in a number to a CSS property
			return value && value.constructor == Number && type == "curCSS" && !exclude.test(prop) ?
				value + "px" :
				value;
	},

	className: {
		// internal only, use addClass("class")
		add: function( elem, c ){
			jQuery.each( c.split(/\s+/), function(i, cur){
				if ( !jQuery.className.has( elem.className, cur ) )
					elem.className += ( elem.className ? " " : "" ) + cur;
			});
		},

		// internal only, use removeClass("class")
		remove: function( elem, c ){
			elem.className = c != undefined ?
				jQuery.grep( elem.className.split(/\s+/), function(cur){
					return !jQuery.className.has( c, cur );	
				}).join(" ") : "";
		},

		// internal only, use is(".class")
		has: function( t, c ) {
			return jQuery.inArray( c, (t.className || t).toString().split(/\s+/) ) > -1;
		}
	},

	/**
	 * Swap in/out style options.
	 * @private
	 */
	swap: function(e,o,f) {
		for ( var i in o ) {
			e.style["old"+i] = e.style[i];
			e.style[i] = o[i];
		}
		f.apply( e, [] );
		for ( var i in o )
			e.style[i] = e.style["old"+i];
	},

	css: function(e,p) {
		if ( p == "height" || p == "width" ) {
			var old = {}, oHeight, oWidth, d = ["Top","Bottom","Right","Left"];

			jQuery.each( d, function(){
				old["padding" + this] = 0;
				old["border" + this + "Width"] = 0;
			});

			jQuery.swap( e, old, function() {
				if ( jQuery(e).is(':visible') ) {
					oHeight = e.offsetHeight;
					oWidth = e.offsetWidth;
				} else {
					e = jQuery(e.cloneNode(true))
						.find(":radio").removeAttr("checked").end()
						.css({
							visibility: "hidden", position: "absolute", display: "block", right: "0", left: "0"
						}).appendTo(e.parentNode)[0];

					var parPos = jQuery.css(e.parentNode,"position") || "static";
					if ( parPos == "static" )
						e.parentNode.style.position = "relative";

					oHeight = e.clientHeight;
					oWidth = e.clientWidth;

					if ( parPos == "static" )
						e.parentNode.style.position = "static";

					e.parentNode.removeChild(e);
				}
			});

			return p == "height" ? oHeight : oWidth;
		}

		return jQuery.curCSS( e, p );
	},

	curCSS: function(elem, prop, force) {
		var ret;

		if (prop == "opacity" && jQuery.browser.msie) {
			ret = jQuery.attr(elem.style, "opacity");
			return ret == "" ? "1" : ret;
		}
		
		if (prop.match(/float/i))
			prop = jQuery.browser.msie ? "styleFloat" : "cssFloat";

		if (!force && elem.style[prop])
			ret = elem.style[prop];

		else if (document.defaultView && document.defaultView.getComputedStyle) {

			if (prop.match(/float/i))
				prop = "float";

			prop = prop.replace(/([A-Z])/g,"-$1").toLowerCase();
			var cur = document.defaultView.getComputedStyle(elem, null);

			if ( cur )
				ret = cur.getPropertyValue(prop);
			else if ( prop == "display" )
				ret = "none";
			else
				jQuery.swap(elem, { display: "block" }, function() {
				    var c = document.defaultView.getComputedStyle(this, "");
				    ret = c && c.getPropertyValue(prop) || "";
				});

		} else if (elem.currentStyle) {
			var newProp = prop.replace(/\-(\w)/g,function(m,c){return c.toUpperCase();});
			ret = elem.currentStyle[prop] || elem.currentStyle[newProp];
		}

		return ret;
	},
	
	clean: function(a, doc) {
		var r = [];
		doc = doc || document;

		jQuery.each( a, function(i,arg){
			if ( !arg ) return;

			if ( arg.constructor == Number )
				arg = arg.toString();
			
			 // Convert html string into DOM nodes
			if ( typeof arg == "string" ) {
				// Trim whitespace, otherwise indexOf won't work as expected
				var s = jQuery.trim(arg).toLowerCase(), div = doc.createElement("div"), tb = [];

				var wrap =
					 // option or optgroup
					!s.indexOf("<opt") &&
					[1, "<select>", "</select>"] ||
					
					!s.indexOf("<leg") &&
					[1, "<fieldset>", "</fieldset>"] ||
					
					(!s.indexOf("<thead") || !s.indexOf("<tbody") || !s.indexOf("<tfoot") || !s.indexOf("<colg")) &&
					[1, "<table>", "</table>"] ||
					
					!s.indexOf("<tr") &&
					[2, "<table><tbody>", "</tbody></table>"] ||
					
				 	// <thead> matched above
					(!s.indexOf("<td") || !s.indexOf("<th")) &&
					[3, "<table><tbody><tr>", "</tr></tbody></table>"] ||
					
					!s.indexOf("<col") &&
					[2, "<table><colgroup>", "</colgroup></table>"] ||
					
					[0,"",""];

				// Go to html and back, then peel off extra wrappers
				div.innerHTML = wrap[1] + arg + wrap[2];
				
				// Move to the right depth
				while ( wrap[0]-- )
					div = div.firstChild;
				
				// Remove IE's autoinserted <tbody> from table fragments
				if ( jQuery.browser.msie ) {
					
					// String was a <table>, *may* have spurious <tbody>
					if ( !s.indexOf("<table") && s.indexOf("<tbody") < 0 ) 
						tb = div.firstChild && div.firstChild.childNodes;
						
					// String was a bare <thead> or <tfoot>
					else if ( wrap[1] == "<table>" && s.indexOf("<tbody") < 0 )
						tb = div.childNodes;

					for ( var n = tb.length-1; n >= 0 ; --n )
						if ( jQuery.nodeName(tb[n], "tbody") && !tb[n].childNodes.length )
							tb[n].parentNode.removeChild(tb[n]);
					
				}
				
				arg = jQuery.makeArray( div.childNodes );
			}

			if ( 0 === arg.length && !jQuery(arg).is("form, select") )
				return;

			if ( arg[0] == undefined || jQuery.nodeName(arg, "form") || arg.options )
				r.push( arg );
			else
				r = jQuery.merge( r, arg );

		});

		return r;
	},
	
	attr: function(elem, name, value){
		var fix = jQuery.isXMLDoc(elem) ? {} : {
			"for": "htmlFor",
			"class": "className",
			"float": jQuery.browser.msie ? "styleFloat" : "cssFloat",
			cssFloat: jQuery.browser.msie ? "styleFloat" : "cssFloat",
			styleFloat: jQuery.browser.msie ? "styleFloat" : "cssFloat",
			innerHTML: "innerHTML",
			className: "className",
			value: "value",
			disabled: "disabled",
			checked: "checked",
			readonly: "readOnly",
			selected: "selected",
			maxlength: "maxLength"
		};
		
		// IE actually uses filters for opacity ... elem is actually elem.style
		if ( name == "opacity" && jQuery.browser.msie ) {
			if ( value != undefined ) {
				// IE has trouble with opacity if it does not have layout
				// Force it by setting the zoom level
				elem.zoom = 1; 

				// Set the alpha filter to set the opacity
				elem.filter = (elem.filter || "").replace(/alpha\([^)]*\)/,"") +
					(parseFloat(value).toString() == "NaN" ? "" : "alpha(opacity=" + value * 100 + ")");
			}

			return elem.filter ? 
				(parseFloat( elem.filter.match(/opacity=([^)]*)/)[1] ) / 100).toString() : "";
		}
		
		// Certain attributes only work when accessed via the old DOM 0 way
		if ( fix[name] ) {
			if ( value != undefined ) elem[fix[name]] = value;
			return elem[fix[name]];

		} else if ( value == undefined && jQuery.browser.msie && jQuery.nodeName(elem, "form") && (name == "action" || name == "method") )
			return elem.getAttributeNode(name).nodeValue;

		// IE elem.getAttribute passes even for style
		else if ( elem.tagName ) {
			if ( value != undefined ) elem.setAttribute( name, value );
			if ( jQuery.browser.msie && /href|src/.test(name) && !jQuery.isXMLDoc(elem) ) 
				return elem.getAttribute( name, 2 );
			return elem.getAttribute( name );

		// elem is actually elem.style ... set the style
		} else {
			name = name.replace(/-([a-z])/ig,function(z,b){return b.toUpperCase();});
			if ( value != undefined ) elem[name] = value;
			return elem[name];
		}
	},
	
	/**
	 * Remove the whitespace from the beginning and end of a string.
	 *
	 * @example $.trim("  hello, how are you?  ");
	 * @result "hello, how are you?"
	 *
	 * @name $.trim
	 * @type String
	 * @param String str The string to trim.
	 * @cat JavaScript
	 */
	trim: function(t){
		return t.replace(/^\s+|\s+$/g, "");
	},

	makeArray: function( a ) {
		var r = [];

		// Need to use typeof to fight Safari childNodes crashes
		if ( typeof a != "array" )
			for ( var i = 0, al = a.length; i < al; i++ )
				r.push( a[i] );
		else
			r = a.slice( 0 );

		return r;
	},

	inArray: function( b, a ) {
		for ( var i = 0, al = a.length; i < al; i++ )
			if ( a[i] == b )
				return i;
		return -1;
	},

	/**
	 * Merge two arrays together, removing all duplicates.
	 *
	 * The result is the altered first argument with
	 * the unique elements from the second array added.
	 *
	 * @example $.merge( [0,1,2], [2,3,4] )
	 * @result [0,1,2,3,4]
	 * @desc Merges two arrays, removing the duplicate 2
	 *
	 * @example var array = [3,2,1];
	 * $.merge( array, [4,3,2] )
	 * @result array == [3,2,1,4]
	 * @desc Merges two arrays, removing the duplicates 3 and 2
	 *
	 * @name $.merge
	 * @type Array
	 * @param Array first The first array to merge, the unique elements of second added.
	 * @param Array second The second array to merge into the first, unaltered.
	 * @cat JavaScript
	 */
	merge: function(first, second) {
		// We have to loop this way because IE & Opera overwrite the length
		// expando of getElementsByTagName
		for ( var i = 0; second[i]; i++ )
			first.push(second[i]);
		return first;
	},

	unique: function(first) {
		var r = [], num = jQuery.mergeNum++;

		for ( var i = 0, fl = first.length; i < fl; i++ )
			if ( num != first[i].mergeNum ) {
				first[i].mergeNum = num;
				r.push(first[i]);
			}

		return r;
	},

	mergeNum: 0,

	/**
	 * Filter items out of an array, by using a filter function.
	 *
	 * The specified function will be passed two arguments: The
	 * current array item and the index of the item in the array. The
	 * function must return 'true' to keep the item in the array, 
	 * false to remove it.
	 *
	 * @example $.grep( [0,1,2], function(i){
	 *   return i > 0;
	 * });
	 * @result [1, 2]
	 *
	 * @name $.grep
	 * @type Array
	 * @param Array array The Array to find items in.
	 * @param Function fn The function to process each item against.
	 * @param Boolean inv Invert the selection - select the opposite of the function.