http://blog.csdn.net/blue_sky_blue_heart/archive/2006/11/06/1369413.aspx
http://www.cnxuexi.com/kaoshi/jisuanji/ruanjianshuipingkaoshi/jieshao/59373.html
http://www.channel7.cn/2004/10-4/191112-8.html
Ajax : http://www.cnblogs.com/Terrylee/archive/2007/01/17/561690.html
