http://www.baidu.com/s?wd=iresign%E8%BD%AF%E4%BB%B6&rsv_spt=1&issp=1&rsv_bp=0&ie=utf-8&tn=baiduhome_pg&rsv_sug3=8&rsv_sug4=1077&rsv_sug1=6&oq=iResign&rsv_sug2=0&f=3&rsp=1&inputT=11256
http://blog.163.com/yuck_deng/blog/static/19501514720111126113440872/
http://blog.csdn.net/berryreload/article/details/24132399