How to get login page when user clicks on browser's back button

Hi,
I am using struts framework.
I have set property nochache=true in response header of all pages.
So, browser does not caches my pages.
Now,when I am clicking on browser's back button, I am getting following message..generated by browser.
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.
Instead of that I want to show user a login page, when it clicks on back button.
Can anyone help me?

Hi,
I agree with your suggestion.But my query is,
If you have seen many credit card or banking websites,generally when user clicks on browser's back button,its redirectly user to login page of it for security reasons.
I want to implement that kind of functionality.So need help on that point

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How to get login page when user clicks on browser's back button

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