为什么一运行就网页崩溃
<!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 arr = otest.childNodes;
for (var i = 0; i < arr.length; i++){
if (arr[i].innerHTML == "HTML"){
var newnode = document.createElement("li");
newnode.innerHTML = "php";
otest.insertBefore(newnode,arr[i]);
}
}
</script>
</body>
</html>
