结果不是期望的反应？？
<html>
<head>
<meta charset="utf-8">
<script src="text.js"></script>
</head>
<body>
<p>111</p>
<h1>hjg</h1>
<script >
pp=document.getElementsByTagName(p);
qq=document.getElementsByTagName(h1);
pp[0].parentNode.insertBefore(qq[0],pp[0]);
</script>
</body>
</html>
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
字符串是要用引号包裹的：