Adding Captcha to website comment section

I need to add captcha or some other image verification system to the comments section on the websites we build to protect from being spammed. This code needs to be implemented so that our users can simply install comments and have captcha enabled automatically. Please review the code included to see what I am talking about. ## Deliverables 1) All deliverables will be considered "work made for hire" under U.S. Copyright law. Employer will receive exclusive and complete copyrights to all work purchased. (No 3rd party components unless all copyright ramifications are explained AND AGREED TO by the employer on the site per the worker's Worker Legal Agreement). ## Platform n/a