radio buttons?

Hi, I am a complete newbe to CB, I have done a search without much success. I need to know ! if it is possible to have a radio button on the login form that when selected further fields appear on the form and 2 if this is possible could somebody point me to info on how to do it. Thanks

Conditions plugin will do that, but unfotunately it does not support the registretion page yet. Maybe in a month or two.

mikko

Thanks for a quick reply.