Mouse follow easing with snapback question

Ok I have a menu with 7 items…

I have a MC that follows the mouse over the menu with this AS


onClipEvent (load) {
	speed = 3;
}
onClipEvent (enterFrame) {
	getlimits = _root.menuBounds.getBounds(_root);
	//get the limits of the menu length 
	if (_root._xmouse>=getlimits.xMin && _root._xmouse<=getlimits.xMax && _root._ymouse>=getlimits.yMin && _root._ymouse<=getlimits.yMax) {
		endX = _root._xmouse;
		_x += (endX-_x)/speed;
	}
}

What I now need to figure out is how to get the MC to return back to whichever section they are currently in if they mouse off the menu.

Anyone have any ideas?

Casey