为什么输出的三个值都是undefined啊？
<!DOCTYPE HTML>
<html>
<head id="txt" name="head1">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>节点属性</title>
</head>
<body>
<ul>
<li>javascript</li>
<li>HTML/CSS</li>
<li>jQuery</li>
</ul>
<script type="text/javascript">
var h = document.getElementById("txt");
// document.write(h.nodeValue);
var k = h.getAttribute("name");
document.write(k.nodeValue+" "+k.nodeType+" "+k.nodeName);
</script>
</body>
</html>
