Multiple radio button group validation

I have a form with 4 lines, each line has 4 radio buttons with values of 1-4.

example:


line 1 - () () () ()
line 2 - () () () ()
line 3 - () () () ()
line 4 - () () () ()


I need to validate by making sure that each line has a unique value selected ie. if line 1 has the first radio button selected then you shouldnt be able to select the first radio button for the other 3 lines… in other words 1,2,3 and 4 have to be selected but on seperate lines. Can anyone point me in the right direction with a listener or have some code handy? I’d appreciate it.

Thanks!

Aaron
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