For example, if a user enters 5 digits (or any amount of digits that is not 8) into Field1 instead of a 8 digits and tries to go to the next field, I want to be able to trigger a validation warning and stop the user from continuing to populate the rest of the form until they either a) deleted input or b) entered in an 8-digit number. In short, I don't want any of the form fields to be able to retain invalid data.
I am thinking about something akin to Excel's "data validation" process when "ignore blank" is unchecked.
Any help would be appreciated.