jquery 节点遍历
<html>
<head>
<title></title>
<script src="Jquery/jquery-1.10.2.min.js" type="text/javascript"></script>
</head>
<body>
<div>AA</div>
<div>BB</div>
<div>CC</div>
<p>DD</p>
<p>EE</p>
<div>FF</div>
<div>KK</div>
</body>
</html>