Quickform: Group Radiobutton Client side rule

It looks like it's quickform day today... so I'll throw this one into the pot to see if anyone can find a solution. I have a Terms of Use and I have a radio button group for "I Accept" and "I don't Accept", you can select one or the other. I want to be able to do this on the Client side. Here is what is not working, I don't know why. If anyone can show me the correct way to do something like this I would be greatful. $agree[] = HTML_QuickForm::createElement('radio', 'yes', 'I Agree', null, 1); $agree[] = HTML_QuickForm::createElement('radio', 'yes', 'I Disagree', null, 0); $this->addGroup($agree, 'agree', "", ' '); $this->addGroupRule("agree",

                   'You must agree to the Terms of Use',
                   'nonzero',  null, null, 'client');

Aaron