在线运行代码 - 菜鸟教程

<!DOCTYPE html>
<html>
<head>
<script src="loadxmldoc.js.html"> 
</script>
</head>
<body>

<script>
xmlDoc=loadXMLDoc("books.xml");

newNode=xmlDoc.createElement("book");

x=xmlDoc.documentElement;
y=xmlDoc.getElementsByTagName("book");

document.write("Book elements before: " + y.length);
document.write("<br>");
x.insertBefore(newNode,y[3]);

y=xmlDoc.getElementsByTagName("book");
document.write("Book elements after: " + y.length);
</script>
</body>
</html>

源代码

动行结果