插入节点appendChild()

<!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 li = document.createElement('li');
  li.innerHTML = 'PHP';
  otest.appendChild(li);
</script> 

</body>
</html>
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原文地址：https://www.cnblogs.com/gide/p/4616604.html