[sparklywater]

Is it possible to make a textbox field which only becomes compulsory to answer if the user has selected 'Other' as the option from a compulsory list of radio buttons? I want to allow the users to select an option from a list of radio buttons, but I only want them to fill in the following 'Other' textbox if they select teh option 'Other' from the radio button list. If they select another option from the radio button list, other than 'Other', then it shouldn't be compulsory for them to fill in the following textbox.