in reply to cgi popup_menu when radio is selected

Is there some reason you don't want to use JavaScript? If you don't use JS, then probably your only other option is AJAX. You might have a look at CGI::Ajax or some of the other Ajax modules on CPAN if that doesn't fit the bill.

Revolution. Today, 3 O'Clock. Meet behind the monkey bars.

I would love to change the world, but they won't give me the source code