how to make the page expired when click back button

From: Darick (darick_ang_at_yahoo.com.sg)
Date: 05/30/04 

Date: Sun, 30 May 2004 18:26:32 +0800

when i try to click back button in some website, the website will show
the message in the following :-

---- start
Warning: Page has Expired The page you requested was created using
information you submitted in a form. This page is no longer available.
As a security precaution, Internet Explorer does not automatically
resubmit your information for you.

To resubmit your information and view this Web page, click the Refresh
button.
---- end

may i know how to do this effect in perl ?