Scroll to position in horizontal div

Scroll to position in horizontal div

I'm building a photo gallery function with jQuery. The thumbnails are in a fixed-with horizontal div with a scroll bar above the main image area, with "previous" and "next" links underneath. Everything is working great, but I would like the thumbnail div to scroll to the appropriate thumbnail image when the "previous" and "next" links are clicked. I've figured out a way to jump to the thumbnail image, but I'd sure love an animated scroll instead. Is this possible?

Here's the page in question:

http://brenahearn.com/fighters-jquery.php