"hidden login"

Hi, please help me figure out how to achieve this

System A needs login, but I can use like this "http://a/index.jsp?user=a&pw=a" bypass the login page.

Now several A systems are running at same time, so I want to create B system to take care of login (but don't remove login from all the A systems)

What I did, after login B system, create URL connection to all A systems, like

http://A1/index.jsp?user=a&pw=a

http://A2/index.jsp?user=a&pw=a

and so on

I got all response code 200, but when I open http://A1/index.jsp, still ask me to login

Is it possible to do such "hidden login" thing, and it's better no to change A system code

Thanks

[712 byte] By [haoa] at [2007-11-26 15:32:06]