Validating Radio Buttons, HELP!!!

Hello, I need some help I'm not great with code and am using dreamweaver, I have a form that I set up I can use spry to make most things require validation however it has nothing for radio button groups. Any Suggestions on how to make them required? Nevermind I found a behavior on adobe exchange that will help. I still need a response to my other post about the swap images though! Any help or suggestions?