1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2 <html xmlns="http://www.w3.org/1999/xhtml">
3 <head>
4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
5 <title>mb5u.com</title>
6 <style type="text/css">
7
8 div {
9 position:absolute;
10 top:50%;
11 left:50%;
12 margin:-150px 0 0 -200px;
13 width:400px;
14 height:300px;
15 border:1px solid red;
16 }
17
18 </style>
19 </head>
20 <body>
21 <div>mb5u.com - Div CSS布局 常见问题</div>
22 </body>
23 </html>
