[Flash AS3] interaktiv bild, panning, zooming - Hjälp

moveMapUp.addEventListener(MouseEvent.CLICK, panUp);
moveMapDown.addEventListener(MouseEvent.CLICK, panDown);
moveMapRight.addEventListener(MouseEvent.CLICK, panRight);
moveMapLeft.addEventListener(MouseEvent.CLICK, panLeft);
zoomMapIn.addEventListener(MouseEvent.CLICK, zoomIn);
zoomMapOut.addEventListener(MouseEvent.CLICK, zoomOut);

myMap.mask = mask_mc;

myMap.addEventListener(MouseEvent.MOUSE_DOWN, startMapDrag);
myMap.addEventListener(MouseEvent.MOUSE_UP, stopMapDrag);

function panUp(e:MouseEvent):void {
myMap.y = myMap.y + 10;
}

function panDown(e:MouseEvent):void {
myMap.y = myMap.y - 10;
}

function panRight(e:MouseEvent):void {
myMap.x = myMap.x - 10;
}

function panLeft(e:MouseEvent):void {
myMap.x = myMap.x + 10;
}

function zoomIn(e:MouseEvent):void {
myMap.scaleX = myMap.scaleX + .1;
myMap.scaleY = myMap.scaleY + .1;
}

function zoomOut(e:MouseEvent):void {
myMap.scaleX = myMap.scaleX - .1;
myMap.scaleY = myMap.scaleY - .1;
}

function startMapDrag(e:MouseEvent):void {
myMap.startDrag();
}

function stopMapDrag(e:MouseEvent):void {
myMap.stopDrag();
}