Skyscraper: 120 x 600
Banner: 125x125
Banner: 120x240
Wide skyscraper: 160 x 600
Small square: 200 x 200
Square: 250 x 250
Inline rectangle: 300 x 250
Banner: 468 x 60
Banner: 468x400
Leaderboard: 728 x 90
special credits goes to Mark Sebastian
