We use wordpress and would like to add a funtion to our website where users can leave reviews.

Here is an example of what we would like it took like
http://tool-rank.com/job-site/ladders/werner-nxt1a06--6-ft.-step-ladder-20080930261/

We like the ajax feature where when a user clicks on leave review, the box opens and they can add their information. We also want to be able to approve them before they are live. Once they are approved we just want them to show up under the item they reviewed. Last we want a page that a user can click on to see all the reviews that were submitted by users.