Approved comments before publish online

I have a website based on Oscommerce. A programmer has program a comments system for each product. Visitors fill a form to post comments. I have joined the actual php script. I would like to add a new function: I want to be able to accept or denied new comments before publish it online. Actuallly, I have problems with Spambot, even if I have recaptcha. You can see the webpage example here: [login to view URL] Maybe a link could be generated in the email sent: when I click the link, it accepts the comment and publish it online. If it is a spam, I don't do anything.