How do CPM ad network know the position of thier ad placed?

Discussion in 'Programming' started by Nestrer, Nov 28, 2006.

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  1. #1
    Most CPM ad network need publishers place ads code display within first 600-800 pixels on the pages, but how do they detect whether their ads are displayed within the area as they asked? Which code they use? in JavaScript? in PHP?

    Thanks
     
    Nestrer, Nov 28, 2006 IP