25850 log clicks

I need a quick hack done. What I need is a simple javascript that will capture clicks done in an adsense-iframe and call my php-script. So everytime a visitor clicks in the iframe with the adsense-ad in it, the javascript will call my script like this: [login to view URL]' + escape([login to view URL]) It must not log impressions, only clicks, and it must work in firefox as well as IE. There are plenty of Adsense-trackers on the market, but I don't need one of those. I only need a Javascript that will call my php-script when a click is made in the adsense-iframe, independent of the browser.