cookies and pages and sessions ( oh my! )

OK, a user visits my site and progresses through the following 3 pages, none which have forms on them, using sessions. PageA (http://URL-XYZ/) SessionID=ID123 -> Cookie PageID=PageA -> Cookie PageB (http://URL-XYZ/) SessionID=ID123 -> Cookie PageID=PageB -> Cookie PageC (http://URL-XYZ/) SessionID=ID123 -> Cookie PageID=PageC -> Cookie If the user now uses the right click on the back button, skips from 'PageC' to back to 'PageA', what does the cookie contain? I'm hoping that it contains: SessionID=ID123 -> Cookie PageID=PageA -> Cookie because there's a separate cookie in memory for each instance of history on the browser, and not, SessionID=ID123 -> Cookie PageID=PageC -> Cookie so that when the user now connects to 'PageB' again, the script knows that the user is coming from 'PageA', not assuming 'PageC'. Any help on this use of cookies would be much appreciated. It's obviously much easier with a hidden variable labeled with the page name.