<!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>无标题文档</title>
<style type="text/css">
h1,h2,h3{
font-size:12px;
}
#beijingyanse{
color:#00F;
background:#F00;
}
#beijingyanse .class{
font-size:36px;
}
</style>
</head><body>
<div id="beijingyanse">
<div class="daziti">
<h1>我的</h1>
</div>
<h2>我的</h2>
<h2>我的</h2>
</div>
<h3>我的</h3>
<h5>我的</h5>
<h6>我的</h6>
</body>
</html>