HelpAS3 How do you change a button size?

I am working on some new UI, and here is the close button to the UI bellow




How can I make the image of the close button smaller when I hold the left mouse button down? I can figure out how to move the image to a new X, Y after I hold the mouse button down, but can't figure out how to resize.

@swankhawk I don't know the answer, but you know how to do something I want to do, any chance I can add you on *******?