编辑下面的代码:【加编码】
<html> <head> <style> a:after {content: " (" attr(href) ")";} </style> </head> <body> <p><a href="/">ziqiangxuetang</a> contains free tutorials and references.</p> <p><b>Note:</b> IE8 supports the content property only if a !DOCTYPE is specified.</p> </body> </html>
结果: 【此窗口】 帮助?
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