How do you avoid the dreaded "re-submit" POST data issue?

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I see websites like pof.com do this and I’m curious how it’s done.

Basically I’m referring to how a website can be constructed so that when people submit information to the server through forms (or w/e other ways it can be done) if they click the back button they do not have to re-submit form data. I see it quite often on websites so I know it’s possible and I don’t think it’s an Ajax thing…

Thanks in advance.

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Get-Post-Redirect.

Refresh gets the redirected page you GET, back takes you back to the previous GET.

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Hrm, well I’ve done some research on the subject and this is what I have concluded so far.

I should have the HTML form submit to the same page that it is on, and then use a redirect rule (say with PHP for example) to cause a 302 redirect to go to a new page?

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