lock or read-only for a radio form element

Suite and Optimus Suite 5
#1

don’t understand how to set programmatically the read-only value of a radio-element in a form;
normally I use

actualForm.setReadonly(id,true);

and for selects I use

actualForm.disableItem(id)

but how to do it on radio-objects?
neither of these two possibilities works …

#2

Hi

readonly and disabled are different things. who do you think readonly radio should looks like?
if you need to keep buttons group enabled but disallow user change it, you can try onBeforeChange event with return false.