[poseidon]

I am working on a popup script which gets shown when the user leaves the page. The problem is, the user keep on getting shown that page whenever he leaves page Everytime which I dont' want.

I just want the pop up to be shown to the first time visitor only. That's it. This can be easily done with PHP but I am just wondering what's the best way of doing it ? Is putting such cookie function on footer file a good idea, since it will called everytime when the page gets load, increasing the loadtime of the page ?

Cheers