<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<header>
<h1>头部</h1>
</header>
<section>
<!-- div:层-->
<div>
<a href="new_file.html" target="nm"></a>
<a href="rmhd.html" target="nm"></a>
<a href="yyphb.html" target="nm"></a>
</div>
<div>
<iframe src="yyphb.html" name="nm"width="100%"height="1000"></iframe>
</div>
</section>
<footer>
<h1>尾部</h1>
</footer>
</body>
</html>