Buttons that move toward the mouse

programming flash
1

** mouseInterval = setInterval(changeAlpha,10);

function changeAlpha() {
contact_mc._alpha = Math.round(_root._xmouse/1024*100);
contact_mc._x = Math.round(_root._xmouse);
}

**This is the code, but I wish to manipulate the x_mouse so that it inverts the value of X, thus making the button in this case move towards the mouse when I move the mouse towards the button,t, and away from the mouse when I move the mouse away from it…
It should also go more opeqe when I move the mouse towards it, but It seems that it should be the same logic.
Thanks in advance, dear Dudes! :b: