DHTML Menu

[lacode0]

I have a DHML menu has a left navigation, top menu and main body. Top menu uses mouse onclick. It works fine with mouseover, mouseout and onclick selects the image and target main body. However, when click left navigation targeting the main, the top menu does not change, the onclick event handler is still there which ideally should be in mouseout state. Considering The top menu and left menu are different files, what should be the best way to coordinate the two?

Thanks

Larry