Welcome to this OpenCAPTCHA.org sample.

This sample web site demonstrates the most basic implementation scenarios of the OpenCAPTCHA.org specification  (as of v0.1.1).

There are two form types demonstrated in this sample:

• The directly-challenged form, where the web site server actually invokes the Challenge-Answer Provider Service directly, pre-includes the challenge in the form, and processes the user's form submit with the web site server's own processing of the challenge/answer validation, or
• The challenge serviced form, where the form could technically be displayed from a plain HTML file (no server code) but then the client side performs an AJAX lookup to a Challenge Service which returns the challenge. The form post would then post to a server-side script that would also invoke the Challenge Service to validate the user's answer.

Select one to continue.