Mega Code Archive
Finds all inputs of type radio within the first form in the document
<![CDATA[
< html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<style type="text/css">
.changeP { font-weight: bold; color:red;}
</style>
<script type="text/javascript">
$(document).ready(function(){
alert($("input:radio", document.forms[0]).length);
});
</script>
</head>
<body>
<form>
<input type="radio" value="Option">
</form>
</body>
</html>
]]>