Independent Yahoo Invisible Detector Script

Hello freelancers, I need an independent Yahoo invisible detector script (independent means that it does NOT grab the results from other invisible detector sites) It works like this: User types in Yahoo ID that he want to check. The result should be online or offline or invisible. I need it to be done in PHP or any language that you see appropriate. If you have any questions let me know and i will explain again. Lowest bid and fastest completion time should win this. Looking forward your bids. Thanks.