【input】
<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 = $("form input:text");
$("div").text("For this type jQuery found " + input.length + ".");
});
</script>
</head>
<body>
<form>
<input type="text" />
</form>
<div></div>
</body>
</html>
