<!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 >
var otest = document.getElementById("test");
var newnode = document.createElement("li");
newnode.innerHTML = "PHP";
otest.appendChild(newnode);
</script>
</body>
</html>