Creating a product selection/filter/data visualisation

Hi all,

Could someone please point me to any tutorials or files on how to create a filter/scrollbar/product selector that helps the user select things on screen by eliminating options based on whether or not they fit a certain criteria.

An example of what I mean is at

http://www.iokio.com/demos/camerafinder/

I just need a few criteria, see how you can move the bars to eliminate cameras that are not in the criteria.

Any help would be appreciated.