function createCircles(evt:Event):void
{    
    for(i=0; i<3; i++)
    {
    var figure:Sprite=new Sprite();            
    figure.circle.x=10;
    figure.circle.y=i*figure.square.height*1.02;
    figure.circle.buttonMode=true;
    figure.circle.addEventListener(MouseEvent.MOUSE_DOWN,downFNC);
    addChild(figure.circle);
    }
}
function downFNK(evt:MouseEvent):void{
    current_mc=MovieClip(evt.target);
    current_mc.x=mouseX;
    current_mc.y=mouseY;
    stage.addEventListener(Event.ENTER_FRAME,appear); 
}

function appear (evt:Event):void
{
    current_mc=???
    current_mc.x=mouseX;

current_mc.y=mouseY; if(mouseX > stage.width/2) current_mc.visible=false;
else current_mc.visible=true; stage.addEventListener(MouseEvent.MOUSE_UP, upFNC); } function upFNC(evt:MouseEvent):void { stage.removeEventListener(Event.ENTER_FRAME, appear); }

hi, i create three circles. if a circle is dragged to right side of the stage, it becomes invisible and vice versa. when MOUSE_UP is invoked, it must stay in its last position.

so in the appear() function how can i assign the selected circle to current_mc?