AJAX Expert needed

We have a website that lists advertisements of cars. Site is developed in php. We need to enhance it with AJAX. Initially only basic information of each advert will be displayed. When user clicks 'More details' link, the details of the car will be displayed below it, the below record will shift downwards to create space. For similar functionality visit [login to view URL] and click 'Customize your homepage' right below the top banner. The final work will be delivered on our webpage ready to use. Please note that adverts are retrieved from the database, but we will handle this ourselves.