I would suggest that this is not the best way to do it. Rather than trying to go back using the history,
you should forward the request back to the form page and use the submitted request parameters to 'refill' the form fields as well as including any error information.
You didn't mention what you are using for back-end processing. If you are using JSP/servlets this is a very common idiom.
hth,
bear
[ August 30, 2003: Message edited by: Bear Bibeault ]