58同城的登录是使用的Post提交方法，提交原文章是这样的
isweak=1&path=http%3A%2F%2Fxa.58.com%2F%3Fpts%3D1356513306818&p1=d25fbcbee8542bf546fbb8e54219d106&p2=f628477367385fe52c7fd1886c30ce4c×ign=1356513341009&ptk=e3741580635e4fd8aab83345a3433853&cd=8739&username=用户名&password=passwordisweak=1&path=h
