for (var i:uint = 1; i < 25; i++) {
    var instance:String = "polaroid" + i;
    initListeners(instance);
}

function initListeners(instance:String):void {
this[instance].addEventListener(MouseEvent.MOUSE_DOWN, startDragging);
this[instance].addEventListener(MouseEvent.MOUSE_UP, stopDragging);
this[instance].doubleClickEnabled = true;
this[instance].addEventListener(MouseEvent.DOUBLE_CLICK ,enlarge);
}

function startDragging(e:MouseEvent):void{
e.currentTarget.startDrag();
}

function stopDragging(e:MouseEvent):void{
e.currentTarget.stopDrag();
}

function enlarge(e:MouseEvent):void{
gallery_mc.largePics.gotoAndStop(e.target.name);
}