[pkfun]

var mouseListener:Object = new Object();
mouseListener.onMouseWheel = function(delta:Number):Void {
	box_mc._y += delta;
	if (box_mc._y<box_mc._height/2) {
		box_mc._y = box_mc._height/2;
	}
	if (box_mc._y>Stage.height-box_mc._height/2) {
		box_mc._y = Stage.height-box_mc._height/2;
	}
};
Mouse.addListener(mouseListener);