You could...and really should be checking for the existence of those variables before calling them.  If they don't exist, use <cflocation> to redirect the user to the correct page.

John

-----Original Message-----
From: Butch Zaccheo [mailto:[EMAIL PROTECTED]
Sent: Tuesday, May 11, 2004 1:52 PM
To: CF-Talk
Subject: <no subject>

I�m looking for a solution to the the �back button� problem. I�m sure there is a stardard way of dealing with this but I don�t know what it is. When a transaction is complete in my shopping cart an invoice is displayed. I eliminate all cookies and zero all session variables so the customer can return to shop on the site if he or she decides to. Unfortunately instead of clicking the �continue shopping� button, customers will most times hit the back button. This causes an error from the lack of session variables/cookies that are no longer present.

I not sure what the best solution to this problem is. Is there a prevent the customer from using the �back� button?

Any help would be much appreciated.

BZaccheo
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