​x
 
<html>
​
<head>
<script type="text/javascript" src="/example/xdom/loadxmldoc.js"> 
</script>
</head>
​
<body>
<script type="text/javascript">
//检查最后一个节点是否是元素节点
function get_lastchild(n)
{
var x=n.lastChild;
while (x.nodeType!=1)
  {
  x=x.previousSibling;
  }
return x;
}
​
xmlDoc=loadXMLDoc("/example/xdom/books.xml");
​
document.write("book 节点的数目：");
document.write(xmlDoc.getElementsByTagName('book').length);
document.write("<br />");
​
var lastNode=get_lastchild(xmlDoc.documentElement);
var delNode=xmlDoc.documentElement.removeChild(lastNode);
​
document.write("removeChild() 方法执行后 book 节点的数目：");
document.write(xmlDoc.getElementsByTagName('book').length);
​
</script>
</body>
</html>
​