Large advertisement page before showing results or landing page?

[JsteRmX]

I am sure you all know what I am talking about here. You know how on some sites, you will click a link or be waiting for your search results, but you will be shown a page in between with a large advertisment on it. Sometimes you have to wait for your desired page to come up, or sometimes you can just click 'skip this advertisement' or 'continue'. I know myspace and gamespot.com does this sometimes (but not always). I am wondering how can I get this sort of advertising system on my website. I would like to give my visitors a chance to skip the ad though. Is there a script that does this? Or maybe some one could give me an idea on how to code this myself (i know some php and mysql)


Thanks a ton in advance. (i love namepros for all the help i receive here - thanks everyone!)