Script to get a response in one field based on answer in another

[Ashleigh Stein]

I have a form that I've created drop down responses (Yes, No, and N/A) and some with (Yes, No). Several questions would automatically need to populate "N/A" if the answer to a different one is "No". I know exactly how to do this in Adobe Pro but the company I'm with now uses Nitro. It doesnt seem to have the same option. Any help in getting this to happen would be great.  (also if anyone knows how to populate the calendar date selector that would also be great)