Mega Code Archive
Selects all paragraphs, then slices the selection to include only the first element
<![CDATA[
< html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("div").slice(0, 1).wrapInner("<b></b>");
});
</script>
</head>
<body>
<body>
<div>asdf</div>
</body>
</html>
]]>