In this page, it is explained how to track clicks with JS. http://www.eggheadcafe.com/articles/adsense.asp They actually use this code (slightly modified), see the source. Is it legal ? Anybody used it ? Thanks.
I use it on adsense tracking script in one of my blog and they do work in IE. They are legal - confirmed with Adsense support. Wrote more about them here: http://labnol.blogspot.com/2005/11/tracking-adsense-clicks-with-google.html http://labnol.blogspot.com/2005/12/visitor-click-tracking-in-adsense.html
i use asrep, and i hate it. looks horrible, the page is too cluttered and you can only use the useful stats after buying it. so, don't go for asrep