Brett_Tabke - 11:37 pm on Jan 30, 2001 (gmt 0)
Study some of the java script banner code from DoubleClick, Engage/flycast, and Burst. They use a tracking code, but also a random number generation. That way, the code is executed on the client computer, generating a random string, causing aol to request the real page and sending the random string and the tracking code back to the site. Toss out the random number, and you've got your session code.