How To Build A Custom jQuery Selector 

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<html>
<head>
	<title>How To Build A Custom Selector In jQuery</title>
 
	<script type="text/javascript" src="jquery-1.2.6.min.js"></script>
	<script type="text/javascript">
 
		// Define the custom selector.
		$.expr[':'].hasTitle = function(
			objNode,
			intStackIndex,
			arrProperties,
			arrNodeStack
			){
			// Create an array to hold the arguments passed to
			// the custom jquery selector. The first several
			// data items are just meta-data about the selector.
			// The list of arguments gets passed as a string -
			// we are eval'ing it into an array.
			var arrArguments = eval(
				"([" + arrProperties[ 3 ] + "])"
				);
 
			// Create a jQuery version of this node.
			var jThis = $( objNode );
 
			// Check to see if this node has any of the given
			// titles. If so, return true (we only need to find
			// one of the titles to qualify).
			for (var i = 0 ; i < arrArguments.length ; i++){
 
				// Check for title equality.
				if (jThis.attr( "title" ) == arrArguments[ i ]){
 
					// We found a title match, return true to
					// indicate that this node should be included
					// in the returned jQuery stack.
					return( true );
 
				}
 
			}
 
			// If we have made it this far, then we found no
			// match. Return false to indicate that this node
			// did not match our selector.
			return( false );
		}
 
 
 
		// Once the page has loaded, get the matching
		// nodes based on title.
 
		$(
			function(){
				var jGirls = $( "li:hasTitle( 'foo' )" );
 
				// Alert girl names.
				jGirls.each(
					function( intI ){
						alert( $( this ).text() );
					}
					);
			}
			);
 
	</script>
</head>
<body>
 
	<h1>
		How To Build A Custom Selector In jQuery
	</h1>
 
	<ul>
		<li title="foo">Sarah</li>
		<li title="bar">Kim</li>
		<li title="foo">Molly</li>
		<li title="bar">Michelle</li>
	</ul>
 
</body>
</html>

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