[phpesp-general] Restrict number of answers

[Phil D. <pdu...@bt...>]

I am trying to produce a survey asking students which courses they would like to take.

There will be a list of about 20 subjects (English, Maths etc.) each followed by a tick box.

I would like to restrict them to ticking only 4 (out of the 20 offered) boxes in total. Is there a way to do this?

 

Phil