如何控制是否选中单选按钮？

I have 3 radio group and 6 radio buttons. During the form's submit event user should check at least one radio from different radio groups otherwise the submit event returns false but when i try to do this by using below implementation it always return false so i'am not able to post this form now. What can be the problem ?I have 3 radio group and 6 radio buttons. Durin