<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
</head>
<body>
<ul id="test"><li>JavaScript</li><li>HTML</li></ul>
<script type="text/javascript">
// var otest = document.getElementById("test");
// var newNode=document.createElement("li");
// newNode.innerHTML="PHP";
// otest.insertBefore(newNode,otest.childNodes[1])
var otest = document.getElementById("test");
document.createElement("li").innerHTML="PHP";
otest.insertBefore(document.createElement("li"),otest.childNodes[1]);
</script>
</body>
</html>
