http://blog.csdn.net/sealyao/archive/2009/09/19/4568989.aspx
http://teaching.sist.sysu.edu.cn/bbs/dv_rss.asp?s=xhtml&boardid=28&id=71&page=1http://blog.csdn.net/sealyao/archive/2009/09/19/4568989.aspx
http://teaching.sist.sysu.edu.cn/bbs/dv_rss.asp?s=xhtml&boardid=28&id=71&page=1