PHP - Ajax script

We need a program in Ajax and PHP which can count number of clicks on some specific images, we have a portfolio page on our website, for this we are basically using popular JavaScript highslide program to display image generated from thumbnails. See enclosed. For this we need to track the number of clicks, using PHP/MySQL back end. So if I open the page with a special request code, example “?&id=5” then it will show the number of clicks against each items. If project will be executed fine, we have more and larger projects to execute.