I have a database I am creating which so far contains three input forms. Each of the forms has 3-4 fields that I want the user to have to enter data into before they can move on to the next field. I am looking for advise on the best way to handle this. The way I would like it to work is if the user leaves one of the required fields blank, a message box should pop up letting them know that it cannot be blank. Then on to the next field and so forth. Any advise much appreciated.