Mega Code Archive
Returns the index for the element with ID foo within another element
<![CDATA[
< html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
alert($("*").index( $('#foo')[0] ));
});
</script>
</head>
<body>
<body>
<div id="foobar"><b></b><span id="foo"></span></div>
</body>
</html>
]]>