How to force POST method page to not expire

[sasito]

Hi there,
I wonder how can I make a POST method page to not expire.
For example if I submit a form with method="POST" when I am on the next page I want to go back using "Back" button of the browser but It gime me the message that the page had been expired.
Can you suggest any method to make it NOT expire and to be able to go back to the previous page using "Back" button.

Thanks in advance.

SaS.