I recently created a AJAX Poll on my website: http://www.lilwaynehq.com and you can see it in the menu on the left. Now I was wondering how can I stop users voting more than once on it?

Is there some sort of script out or even a tutorial for me to follow or if you know a way, please let me know

Thanks alot

Well, you can identify a user by a cookie, or by IP address. Both of these have their problems, but...

Well I dont mind if that a user clears their cookies, that they are allowed to vote again

Personally, I would use a $_SESSION, it is a server-side cookie that is based on the IP. Not perfect, since some people(like those connected via satellite), have rotating IP addresses, but I still like it best. Of course, you could always check against both cookies and sessions, but for the most part, one is enough.

Ok, do you have a tutorial on this please mate

Here it is directly from the horse's mouth: http://php.net/session