control third party page in java.

Hi,
:-??
I have to control third party page like suppose if there is one Login page which code is not at our end so when i hit the url of this login page and page will desplay i want that userid and password field should be filled with value(user name and password).But as this page and its code is not at our end so how can i do this in java.if anyone has any solution in your mind kindly suggest.

I think you should post this somewhere else, preferabbly not in the member introductions forum ;). Post this in one of the help forums please.