Captcha replacement

Posted by portoalet on Stack Overflow See other posts from Stack Overflow or by portoalet
Published on 2010-03-19T08:14:07Z Indexed on 2010/03/19 8:21 UTC
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Hi,

I stumbled upon http://www.kettletime.com.au/chance where the user needs to drag and drop a box with a number into another box to prove that he is human.

How do you implement this? Any free library to do this?

Thanks

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