<title>无标题页</title>
</head>
<body>
<div id="roboth"></div>
<script type="text/javascript">
//<![CDATA
//attributes elements NamedNodeMap
var div=document.getElementById("roboth");
alert(div.attributes.getNamedItem("id").nodeValue);
alert(div.attributes.item(0).nodeValue);
alert(div.getAttributeNode("id").nodeValue);
alert(div.getAttribute("id"))
//]]>
</script>
</body>
</html>