<!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>
<title>test</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style>
/*test*/
*{ margin:0; padding:0; font-size:12px; font-family:Verdana, Arial; line-height:1.8; list-style:none;}
#info,#nav{ margin:50px; border:1px dashed #f30; background:#ffc; padding:50px;}
#info div{background:#f00; width:0px; height:0px; overflow:hidden; margin-bottom:10px;}
/*测试*/
#com_a{ border-top:10px solid #ffc;border-left:10px solid #f30;border-bottom:10px solid #ffc;}
#com_b{ border-top:10px solid #ffc;border-right:10px solid #f30;border-bottom:10px solid #ffc;}
#com_c{ border-top:10px solid #ffc;border-right:10px solid #f30;border-bottom:10px solid #ffc;border-left:10px solid #f30;}
#com_d{ border-top:10px solid #f30;border-right:10px solid #ffc;border-bottom:10px solid #f30;border-left:10px solid #ffc;}
#com_e{ border-top:10px solid #ffc;border-left:10px solid #f30;}
#com_f{ border-top:10px solid #f30;border-right:10px solid #ffc;border-left:10px solid #ffc;}
#com_g{ border-right:10px solid #ffc;border-bottom:10px solid #f30;border-left:10px solid #ffc;}
#com_h{ border-top:10px solid #f30;border-bottom:10px solid #f30;border-left:10px solid #ffc;}
#com_i{ border-top:10px solid #f30;border-right:10px solid #f30;border-bottom:10px solid #f30;border-left:10px solid #ffc;}
</style>
</head>
<body>
<div id="info">
<h1>测试</h1>
<div id="com_a"></div>
<div id="com_b"></div>
<div id="com_f"></div>
<div id="com_g"></div>
<div id="com_c"></div>
<div id="com_d"></div>
<div id="com_e"></div>
<div id="com_h"></div>
<div id="com_i"></div>
</div>
</body>
</html>