Found the answer in pjx_chained.pl. Didn't know about the Manifest feature of CPAN, I appreciate the pointer. I'm not ready to start writting Javascript too, I've only been working with Perl for about two months now. So far I've gotten away with very minimal javascript.
The answer was to add another sub to my $ajx object declaration as seen below:
my $ajx = new CGI::Ajax ( 'viewsub' => \&subViewSub, 'updatesu
+b' => \&UpdateSub );
Previously this was only the viewsub, but adding updatesub allows me to reference that routine from the buttons that were created by the first one.
