validation problem with multi-page form: radio buttons seem to inherit previous selection state

[eluser]xorcistforyou[/eluser]
i am trying to do multi choice survey system. Each test has 20 questions..

i finished admin panel for this. i am using unlimited cat list, adding question under this cats and update - delete - new quest... i am planning ffront-end now.

how do you compare right and wrong answers when the form submitted.

Can you give me some code for this or some advice the solve this..