[fw-general] Zend_Form: possible to disable some multi options in radio button

[Ralf Eggert]

Hi,

I have a radio button element with several options. I would like to
disable some of them. They should be shown but they should not be able
to be activated. With this I can only disable all radio buttons together:

$form->getElement('selection')->setAttrib('disable', 'disable');

Any chance to get this done?

Thanks and best regards,

Ralf