http://www.cnblogs.com/lovecherry/archive/2007/08/13/853754.html
http://www.cnblogs.com/yuyijq/category/145285.html
http://www.cnblogs.com/lyj/archive/2008/03/25/1119671.html
http://www.cnblogs.com/126/articles/924882.html
http://kb.cnblogs.com/page/42466/3/
