I just can't see a way to even begin this to be honest.
See HTML5: How to use the "required" attribute with a "radio" input field for more information on how to do this well. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).
Would you like to answer one of these unanswered questions instead?
Is there any quick fix that I can do to the code above to make it work in Netscape?
Having a few issues and cannot see a way to actually do the following.