<!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 id="bb">JavaScript</li>
<li>HTML</li>
</ul>
<script type="text/javascript">
var otest = document.getElementById("test");
var newcode = document.createElement("li");
newcode.innerHTML = "PHPp";
otest.appendChild(newcode);
</script>
<script type="text/javascript">
var a=document.getElementById("bb")[0];
document.write(a.innerHTML);
</script>
</body>
</html>
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