Paste in code, then trigger a pop up menu

[Bobsterz]

Hi, I can't seem to find this in the help file...

From an initial pop up menu, I want to go to a URL and pop up a menu so I can paste in the user/password.

I tried this:
Auth.net :key "http://www.authorizenet.com/" Y mac "SITE"

SITE is the name of the pop up with the pass codes.

It gets me into website.com but then nothing.

Thanks for any help!

Bobsterz