My brain is unusually slow this AM. Can you do a visual image of how this would work? Or is there a website where the buttons function in this manner?

Xara does support a mousedown layer as well as mouseoff and mouseover. But this only affects the appearance of the button when it is clicked. And as far as I know only supports one action.

You can create a pseudo button effect in which the mouse over button is actually on a pop-up layer. In this case the button on the pop-up layer can link to another action. The mouse off button links to the pop up layer.