[HELP] Generator

I have over 2500 used retail codes. I want the user to have to enter in a username, password, and secret questions, to be able to press the 'Generate' button. I want it so when the user presses 'Generate', in text1, one of the codes to pop up. I also want the info they entered in (the username, password, and SQs) to be emailed to me. I have no idea where to start. Would anyone mind helping?

(This is not real, this is going to be a phisher)

maybe we can work together...have u msn?

Yes I do, Meateaterr@hotmail.com. Do you know what you're doing though?