类似效果的东西找了好久，终于找到一个 记录下
http://www.cnblogs.com/aivdesign/articles/1236232.html
http://www.cnblogs.com/beniao/archive/2008/07/05/1236104.html
类似效果的东西找了好久，终于找到一个 记录下
http://www.cnblogs.com/aivdesign/articles/1236232.html
http://www.cnblogs.com/beniao/archive/2008/07/05/1236104.html