帮我看看这个网址的意思。
https://reg.163.com/logins.jsp?type=1&product=mail163&url=http://entry.mail.163.com/coremail/fcg/ntesdoor2?lightweight%3D1%26verifycookie%3D1%26language%3D-1%26from%3Dweb%26style%3D-1
特别下面这段起什么作用。为什么还要加一个网页地址啊。
url=http://entry.mail.163.com/coremail/fcg/ntesdoor2?lightweight%3D1%26verifycookie%3D1%26language%3D-1%26from%3Dweb%26style%3D-1