How to Prevent Browser Caching?

[TeroLebe]

I've done a game with Flash that uses variables on a PHP-pages (loadVariables)... But I noticed that the Browser has left the php-pages I've used in a Windows Temporary-internet-pages-folder. So it's a major security problem, if user can use these pages over and over again.

1)
Is there any way to prevent browser to cahching these php-pages?


edit:
And I don't mean just using "mypage.php?junk="+Math.random()
These sites get cached too, the browser just don't know they are all the same site... You can find all of these pages in Temporary-Internet-Files-Folder.