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Detecting invisible yahoo users

Discussion in 'Web Development' started by ndakota, Aug 9, 2008.

  1. ndakota

    ndakota New Member

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    Hi Friends!
    I am amazed by certain web sites which can tell you if your yahoo messenger contact is invisible or offline.
    Can anyone explain me how do they do this?
    They even get our avatars on their page.
    How is this possible?
     

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