Has anyone made a dynamic filter page for their data

I would like something a little more interactive for my users. Think of when you go to a car site and you are trying to find a car. You have sliders to set the year, price... you have checkboxes to set type (coupe, convertible, etc). As you check off each of these a button at the bottom says "See 112 results" and then you change the price and it drops to "See 44 results"...

I know I can do the checkboxes and dropdowns using the filter feature already in phprunner (that shows on the left menu). The part that I can't do is the changing dynamic counter of how many results this would yield.

If I could take the advanced search page and make the controls a bit more fun to use and have a dynamic counter on the page of how many search results are found as you make each change that would be ideal.

Has anyone done anything like this?