How to let the browser repost form data automatically?

I am developing a web site using php.I have a form for login in page1, which has two input box and a submit button. When I click the submit button in page1, it runs page2. When I click BACK button(now in page1), and FORWARD button (supposed to be in page2). Both IE and Netscape give me a message like the following:

*********************************************
This document resulted from a POST operation and has expired from the cache. If you wish you can repost the form data to recreate the document by pressing the
reload button.
*********************************************

When I press the RELOAD button, page2 is load correctly. Now, how can let the browser automatically do the reload without showing me the above message?

Thanks

I do not think Javascript will be your most efficient route.

Unless you are using frames the only real function you will be able to use is the onUnload() when you leave the first page.

I think you will find your answer in php.

just my 2 cents.

-brian d.

[This message has been edited by brian@studiom80.com (edited December 28, 2000).]