I am using this PHP captcha tool on my website: https://web.archive.org/web/20060703144957/http://www.white-hat-web-design.co.uk/articles/php-captcha.php
After filling out a form, and depending on if the user inputs the correct security code, the user is taken to a success or failure page. However, if the user returns to the form using the Back button, the the form is empty.
Can I run the captcha processor without loading a new web page? Or, is there an alternate captcha library that works without reloading the web page?