51help TIY
码：
<html> <head> <style type="text/css"> body { background-image:url('/i/eg_bg_03.gif'); background-repeat:no-repeat; background-attachment:fixed; background-position:center; } </style> </head> <body> <body> <p><b>提示：</b>您需要把 background-attachment "fixed"该属性在 Firefox 和 Opera 。</p> </body> </body> </html>
查看结果: