public function getPhoto(i:uint, callback:Function):BitmapData
        {
            var BMD:BitmapData = new BitmapData(photos[i].width, photos[i].height);
            var imgReq:URLRequest = new URLRequest(photos[i].source);
            var imgLoader:URLLoader = new URLLoader();
            imageLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, function(e:Event):void
            {
                    callback((imgLoader.content as Bitmap).bitmapData);
            });
            imgLoader.load(imgReq);
        }