Is it possible to disable a radio option when a selctbox/radiobutton is enabled?

Here is the testform:

http://kunden.mediengaarage.de/bps/form-frame.html

http://form.jotformeu.com/form/52082313686354

When i select "Ja" at "Expressgutachten" then at step 4 the radio option "per Post ..." should be disabled.

Hi,

Though it is not possible to disable specific options in a field when selection are made in another, you could create a second set of fields that do not contain the "per Post (bei Express-Gutachten nicht möglich)" option.  You would then conditionally show that set if fields if "Ja" is selected or show the current fields if "Nein" is selected:

http://www.jotform.com/help/196-Hide-or-Show-Multiple-Fields-at-Once

This will give the functionality you are looking for.  I setup a quick test form to show you how it would work:

http://support.jotform.com/form/52795437750970

Thank you for the idea!

You are very welcome!  If there is anything else we can assist you with, let us know and we will be happy to help.