​x
 
<html>
<head>
<script type="text/javascript" src="/example/xdom/loadxmldoc.js"> 
</script>
</head>
<body>
<script type="text/javascript">
//检查第一个节点是否是 element 节点
function get_firstchild(n)
{
var x=n.firstChild;
while (x.nodeType!=1)
  {
  x=x.nextSibling;
  }
return x;
}
​
xmlDoc=loadXMLDoc("/example/xdom/books.xml");
​
var x=get_firstchild(xmlDoc);
document.write("Nodename: " + x.nodeName);
document.write(" (nodetype: " + x.nodeType + ")");
</script>
</body>
</html>
​