Tracking link clicks

[eluser]stuffradio[/eluser]
I'm trying to figure out the best way to track a clicked link and have it redirect to a url and have that update a value in the db according to the ad id and username.

Any suggestions?

[eluser]Ickes[/eluser]
Is the clicked link to a place within your own site?

If so, why not pass the username and ad name as URI segments and insert immediately upon landing if they exist? If you don't want to use URI, how about as session data since the user is obviously logged in?

Maybe I am not understanding the entire question...

[eluser]stuffradio[/eluser]
It is an ad displayed on a remote site. The ad is displayed via javascript and php from within the site.