Hi
I am making a seating plan which first you have to select a row A-L then you need to select
a seat but there are different numbers of seats within the rows so when i book a seat in row A
and select seat 20 it comes up as an error as it doesn't exist but how do i enable a message box to appear instead
saying 'sorry this seat does not exist' If you know how to do this please would you tell me.
Thankyou :D