Captcha

hey guys i need to have Captcha to validate that the user is human. i need the user to select the correct image to continue. the Captcha must be inside a update panel.

i have used this website but i getting it to work on page load but when i click or do a postback it go to text the Captcha

s3capcha

please help me
JCWEBHOSTAsked:
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Luis PérezConnect With a Mentor Software Architect in .NetCommented:
Try this module, it is widely used in the WWW and it's easy to use with ASP.net:

http://www.google.com/recaptcha

Here you got the ASP.net-specific page on how to use it:

https://developers.google.com/recaptcha/docs/aspnet?hl=es

Hope that helps.
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JCWEBHOSTAuthor Commented:
sorry but i am looking for the one which list 4 image and the user selects the correct image.

it will say somthing like click on a computer and have four different image and the user must click on the correct image
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