CSS Help: Onload Down state

[SPSPilot]

I have a drop down menu with 1 main level and a sublevel underneath that. First level is called Box1 and displays an image and when the user clicks on a selection of box one it displays a down image and drops down the menu (called box2) displaying a list of choices in plain text. I wanted to know if there was a way when the user clicks on a selection in Box2 that it shows a down state until they click on another selection?

Any examples and advice would be greatly appreciated. I have copy of the code at my home office which I can put up if need be?

[Twey]

Think that would be a good idea.