Handy Flash banner ad clickTAG tutorial for anyone who doesn’t do this often enough to remember the technique off the top of their heads. This sort of thing is for use in ad syndication services like Google AdWords. Also, some good stuff at the Adobe site.
Each ad network uses different case sensitivity rules for the clickTAG variable (groan), so check into your network’s requirements. Google AdWords has a help page on clickTAG coding here.