Using AJAX with CAPTCHA - AJAX Security Part 3 of 3 - waelchatila.comBackground This article shows one way to use AJAX along with a series of images to create a secure CAPTCHA system. CAPTCHA is a way to tell humans and computers apart and is used all over the web, especially if you're signing up for new email accounts. For more background information and definitions, see http://en.wikipedia.org/wiki/Captcha Building an AJAX CAPTCHA First a database of images is c
