I am designing a form with lots of fields. Most of the fields are required. When a user clicks the submit button, I must use a perl script (not use javascript to do client verification) to verify if all the required fields are filled in or not. If not, it generates some information and gives the user back the incomplete form. After the script checks all the required fields filled, it gives "Thank you".
At this time, I don't want the user to click the back button and submit again. Is it possible to display a blank form after the back button clicked? Thanks.