richmondsteve - 1:31 pm on Feb 25, 2004 (gmt 0)

monolitik wrote:

We developed an heuristic algorithm to guess the click indirectly, which involves analysis of some other events the visitor generated before leaving the document.

Tracking impressions is straigtforward. I am curious how you attempt to guess 1. whether an ad is clicked, 2. which ad position is clicked and 3. what the destination URL of that ad is and does so without violating the AdSense TOS. With a pretty major assumption about user behavior I can think of a way to use the onMouseover event to estimate #1 and #2, but not #3.