whats this jquery plugin?

[unwashed potato!]

http://totallygreentotallyclean.com/

the one where if you click one of the 4 smaller images and it changes the larger background and the text.

from what i can see it's something called cufon but googling suggest it's not

 

[unwashed potato!]

thanks guys. haven't played with jquery in far too long seems like a big job but perhaps it's not once i get going with it again think i'll pick it up again.