remove captcha forms from sites

I need to remove some captcha forms from my sites without the contact form getting messed up for my clients. i have around 7-9 sites this is en example contact form with the captchas used on the site [login to view URL] now, there are 7 sites that have a contact form and captcha similar to the script used on this site. some sites have mini email forms that are on almost every page, but i don't think you'd have to go page by page to remove them. There are a total of two of these site with these smaller contact forms, 15-30 pages for each one. The sites were developed by a professional. it needs to be done asap, thanks.