html代码：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>JS动态插入内容到DIV</title>
<meta name="keywords" content="" />
<meta name="description" content="JS动态插入内容到DIV" />
<base href="https://www.bbinhome.com" target="_blank" />
<link rel="miphtml" href="https://mip.bbinhome.com" />
<link rel="alternate" type="application/rss+xml" title="JS动态插入内容到DIV" href="https://www.bbinhome.com/rss.xml" />
<link rel="shortcut icon" href="favicon.ico" type="image/vnd.microsoft.icon" />
<link href="/templets/default/style/index.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="test.js">
</head>
<body>
<div id="test">
</div>
</body>
</html>
test.js 文件内容：
window.onload = function() {
var test = document.getElementById("test");
test.innerHTML="<p>JS动态插入内容到DIV</p>";
}