It's called Captcha http://en.wikipedia.org/wiki/Captcha
Here's 10 examples (reCaptcha probably being the most common): http://woork.blogspot.com/2009/02/10-free-captcha-scripts-and-services.html -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
