Asp.net的__EVENTARGUMENT __EVENTTARGET一些参考网址
http://forums.asp.net/t/1501397.aspx/1
http://msdn.microsoft.com/en-us/library/debx8sh9.aspx
http://en.csharp-online.net/HTTP_Post
http://blog.csdn.net/terry001/article/details/2615965
http://aspalliance.com/articleViewer.aspx?aId=895&pId=-1
http://www.evagoras.com/2011/02/10/how-postback-works-in-asp-net/
http://blog.163.com/szmax_limin/blog/static/5818286120080234524192/
http://www.cnblogs.com/jinianjun/archive/2012/02/09/2343868.html