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on a page check to see if the session var $_SESSION['MySessionVar'] exists and if it doesn't set it and if it does exist then they have either refreshed or navigated back to the page
If you use the AJAX tecnique with iframes, then you can still use the back buttons, but if you use the XmlHttp object, then you shouldnt be able to go back unless you REALLY came from another page.
Cameri wrote:If you use the AJAX tecnique with iframes, then you can still use the back buttons, but if you use the XmlHttp object, then you shouldnt be able to go back unless you REALLY came from another page.