代码示例：（标识：xdom_createcomment）
<html>
<head>
<script type="text/javascript" src="/static/demo/html/js/loadxmldoc.js"></script>
</head>
<body>
<script type="text/javascript">
xmlDoc=loadXMLDoc("/static/demo/xdom/books.xml");
x=xmlDoc.getElementsByTagName('book');
for (i=0;i<x.length;i++)
{
newComment=xmlDoc.createComment("Revised March 2008");
x[i].appendChild(newComment);
}
for (i=0;i<x.length;i++)
{
document.write(x[i].getElementsByTagName("title")[0].childNodes[0].nodeValue);
document.write(" - ");
document.write(x[i].lastChild.nodeValue);
document.write("<br />");
}
</script>
</body>
</html>
