[huncyrus]

captcha tutorial was on Hotscripts.com :: The net's largest PHP, CGI, Perl, JavaScript and ASP script collection and resource web portal and on PHPBuilder.com, the best resource for PHP tutorials, templates, PHP manuals, content management systems, scripts, classes and more. too.

For simple captcha must running on server a GD2 library and PHP4 (if u creaing in php... )