Display image on hover link in another DIV

hey guys

I need help, I am having this project and i want upon hover over to display various images where are the current pictures

I tried in menu.css to use
.#nav ul li a:hover {
background-image:url(image) ;
position: xxx etc

but still it display is MENU NAV bar, but i want to have in different DIVs

the project is here, feel free to view its source code

test.schpuntak.com

thanks a lot!!