[jQuery] Simple XPATH Selector

[jQuery] Simple XPATH Selector


Hi,
I am trying XPATH selector with jquery....it doesn't seem to
work..find below the eg.it should select the paragraph.
can any tell me what I am missing.
THnks
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html;
charset=utf-8" />
<title>New Web Project</title>
<style type='text/css'>
.jq{
background-color:red;
}
</style>
<script type="text/javascript" src="/lib/jquery/
jquery.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("//p").addClass("jq")
})
</script>
</head>
<body>
<h1>heading</h1>

paragraph


</body>
</html>