Use grouped checkboxes with only some secured with password?

Hi,

I have a set of 4 checkboxes on my form that I have set as a radio group so that only 1 checkbox may be checked at once.  But I'd like to use Mr. George Johnson's JavaScript code on only 2 of the checkboxes so that those 2 cannot be checked unless the person has the password while the other 2 can be freely chosen without a password.  Is there a way to do this either within the code or just with the form properties?

Thanks,

Misery9980