NEED A TIPP: Another Frame for Special Offers

I want to give the Products in the Prodictslist (Catalog & Search),
which are have a Special Price, another .LIST TD Design.
How can i realize this. Now ALL TDs have the SAME CSS Clas ...

I need a TIP :-) that i can give ONLY the .LIST TD also another Class
if there contains a "Product Special Offer"...