Random thumbs + clicks data collection

I'm looking for a script that will randomly choose thumbs from a folder and insert them into a page. The script also need to record clicks data. After "X" period of time, I need to be able to only chose the most clicked thumbs and show them at the top of the page and in some important area of the page. I also want to be able to restart from scratch with new thumbs and add new thumbs and start collecting clicks data again. Each thumb have a rollover action, I don't know if it can be an issue. See a test in action on this page: [login to view URL] On rollover, the thumb that appear is always thumbname"b" [login to view URL] [login to view URL]