How do I get multiple instances of this thumbnail grid to function on the same page?

[qleez]

I'm playing around with this thumbnail grid with expanding preview on codrops but can't figure out how to get multiple instances of it functioning on the same page. Here's a link to it:http://tympanus.net/codrops/2013/03/19/thumbnail-grid-with-expanding-preview/The expanding won't occur on any thumbnail grid except the first; the rest just act like regular image links. I assume I have to uniquely identify each thumbnail grid so the script activates more than once, but I'm not sure how to go about that.