please note: this is an alternative to the captcha system included in webgui.
reCAPTCHA provides a more legible captcha mechinism for your users and also provides an alternative audio captcha for the blind and visually impaired. For more information on reCAPTCHA see http://recaptcha.net/learnmore.html (they were purchased by google: use this link if the above stops working: http://www.google.com/recaptcha/learnmore)
How to enable reCAPTCHA on your WebGUI site:
Now you're ready to enable captcha on collaborations and data forms and anything else that uses a captcha.
Keywords: accessibility captcha reCAPTCHA