Flash drawing

1

i have this code on first frame

stage.addEventListener(MouseEvent.MOUSE_DOWN, mouseDownHandler); 
stage.addEventListener(MouseEvent.MOUSE_UP, mouseUpHandler); 
stage.addEventListener(Event.RESIZE, resizeHandler); 
 
  
         function mouseUpHandler(param1:MouseEvent) : void 
        { 
            stage.removeEventListener(MouseEvent.MOUSE_MOVE, mouseMoveHandler); 
            return; 
        } 
     
 
        function mouseMoveHandler(param1:MouseEvent) : void 
        { 
            var _loc_2:Graphics; 
            _loc_2 = graphics; 
            _loc_2.lineStyle(10, 6710784); 
            _loc_2.lineTo(stage.mouseX, stage.mouseY); 
            return; 
        } 
 
         function mouseDownHandler(param1:MouseEvent) : void 
        { 
            var _loc_2:Graphics; 
            stage.addEventListener(MouseEvent.MOUSE_MOVE, mouseMoveHandler);            
            _loc_2 = graphics; 
            _loc_2.moveTo(stage.mouseX, stage.mouseY); 
            return; 
        } 
             function refreshUI() : void 
        { 
            clickToDraw_mc.x = stage.stageWidth / 2 - clickToDraw_mc.width / 2; 
            clickToDraw_mc.y = stage.stageHeight / 2 - clickToDraw_mc.height / 2; 
            return; 
        } 
           function resizeHandler(param1:Event) : void 
        { 
            refreshUI(); 
            return; 
        }

and this works perfecly…i can draw with mouse all over stage…but when i import image (handball field) and drag picture on stage i can only draw beneath this picture…my question how can i reference in AS3 code to draw on that imported picture…i wanna do something like whiteboard for coaches so they can draw actions for game…