random link script
 

I'm using a very very very basic random url script to handle some trades.
Most are done with hard links.

Problem With it!! There is nothing in place to ensure the surfer does not return to the same website they just came from.

For example: Site "Z" sends a surfer, and they hit the random link, and by chance "Site Z" opens. The very same website the surfer just came from.

Is there a cookie or extra code or something I can setup to make sure the script would not send them to the last website they have visited?

I don't want to setup ucj or cj etc...
but I would like to make sure I don't send the surfer to the site they just came from.

If you know, please code the code or something. Thanks.