question about tshirthell.com script
 

Does anybody know what script tshirthell.com is using or where I could find something similar? I like the feature that lets background color change while the text stays constant (i.e. the shirt color changes while text remains the same) while you choose the options of the tshirt you want. I'm Looking for a script that does that.

http://www.merchantpal.com/

they use scripts from there