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Guestbook post validation

A feature known as CAPTCHA (Completely Automated Public Turing test to Computers and Humans Apart) is being implemented by Madasafish, this feature allows a user to circumvent unwanted SPAM in Guestbook entries.

CAPTCHA is a word rendered as a distorted gif image, and the user is required to examine the image and type in the correct word.

For example: 

CAPTCHA is integrated directly into the Guestbook script and requires no user configuration.

When uploading forms you will need to complete the Captcha before the Guestbook updates.

NOTE: Browser cookies are required to use this feature. If someone attempts to post to the Guestbook without cookies enabled, the process will FAIL after the word is submitted. You have to type in the word within 5 minutes to avoid the process from expiring.

FAQ's

• Do I need to change anything to use this?
  No. The new process is built into the addgp.pl script and requires no changes to web site code.
• Do I have to use this?
  Yes. It cannot be disabled in the Guestbook preferences. Due to excessive Guestbook spamming, it was decided that the best policy was to require this protection.
• What about accessibility?
  We are aware that these kind of tests can cause issues for visually impaired users. Additions will be made in the future (wav files for instance) but in the interim is important to prevent Guestbook spam from getting any worse.
• Can I template the confirmation page to match my site?
  No.
• Is the word I type in case-sensitive?
  No.

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