Well, then the history is a client side thingie. It can be accessed through a client side language, like JavaScript. Then you can use JavaScript itself to modify the page on the fly or, if you want the job to be done on the server you can have it say post some relevant info upon which the server will serve a suitable page. Or else you may have the client communicate with the server with AJAX techniques. That's pretty much everything that's to it. But then again... I for one would find your site's behaviour to be very annoying: I often right-click-open-in-new-tab links instead of plain clicking them. Why should the page I get to be different across the two cases?