resize -- must be in display
public function resize(fx:Number = 1.0, fy:Number = -1.0): Number {
if (fy == -1.0) fy = fx;
var x:Number = this.width / player.width;
var y:Number = this.height / player.height;
var s:Number = 1.0;
if (x > y) s = y; else s = x;
player.scaleX = s * fx; player.scaleY = s * fy;
return s;
}