Couldn't find it but found my magic 8 ball instead.
Asking your question: "how the hell do i write a banner code for 728x90?"
Shaking up magic 8 ball:........
Answer revealed: Thats a secret
You can get these and more answers to incomplete questions here:
http://artofhacking.com/games/FUNNY/8BALL.SHT
hehehehe just had to play with ya here. :-)
So seriously please re-state your question and try to elaborate.