51help TIY
码：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <head> <style type="text/css"> a:after {content: " (" attr(href) ")" } </style> </head> <body> <p><a href="../index.htm" tppabs="http://www.51help.tk/">51help</a> contains free tutorials and references.</p> <p><b>注释：</b> !DOCTYPE，那么 Internet Explorer 8 content 属性。</p> </body> </html>
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