<html>
<head>
<script type="text/javascript" src='http://code.jquery.com/jquery-1.5.2.js'></script>
<script type="text/javascript">
$(document).ready(function(){
var input = $(":submit");
$('#result').text('jQuery matched ' + input.length + ' elements.');
});
</script>
</head>
<body>
<form><input type="submit" /></form>
<div id="result"></div>
</body>
</html>