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<!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"> .main{ position:absolute; top:50%; left:50%; width:200px; height:100px; margin-top:-50px; margin-left:-100px; border:1px solid red; line-height:30px; font-size:16px; text-align:center; } </style> </head> <body> <div class="main">王锋老师博客:http://blog.sina.com/wangfengteacher</div> </body> </html>
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原文地址：http://www.cnblogs.com/wesky/p/5048814.html
