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http://www.cnblogs.com/lhb25/archive/2012/10/24/jquery-loading-animation-and-progress-bar-plugins.html
http://www.php1.cn/article/5928.html
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http://developer.51cto.com/art/201402/430550.htm
http://blog.csdn.net/wiker_yong/article/details/20302989
http://www.open-open.com/news/view/49de24
http://developer.51cto.com/art/201402/430550.htm
http://blog.csdn.net/wiker_yong/article/details/20302989
http://www.open-open.com/news/view/49de24