Currently, I am trying to get a code together that will rotate between Google AdSense, and Yahoo! Publish Network. They both are ran on PHP. Every time someone goes to a page I want it to show say a google ad, then if they go to a new page, or reload I want it to switch between ads.

Any suggestion or if you have a code already, share it with me please...

The only thing I can think of is to use javascript.. I don't know how possible this is, but you could maybe modify a rotation script (this was just a quick Google check, so I apologize for any inaccuracies)..
http://www.designerwiz.com/JavaScripts/ban..._on_refresh.htm

Sorry I can't be very helpful. =\