Totally lost asigning event listener

1

hi, i feel totally idiot trying to find how to assign listener to an object created with this function…

private function placeBtn(thumb:String, Xthumb:Number, Ythumb:Number, targetHolder:MovieClip, ID:String):void{
    
    var clipHolder:MovieClip = new MovieClip(); 
        clipHolder.x = Xthumb;
        clipHolder.y = Ythumb;
        clipHolder.nombre = ID;
        
    var Loader1 = new Loader();
        Loader1.load(new URLRequest(thumb));
        Loader1.mouseEnabled = false;
        clipHolder.addChild(Loader1);
    targetHolder.addChild(clipHolder);
    }

of course i can see it has a instance name assigned by compiler but i would like to have a way to assign one so i don’t have to figure out wich is the name compiler assign… i created clipHolder.name = ID for this purpose but don’t have a clue if it work…heeeeeeelp…
i invoque the function using this:

public function btnClick1(evt):void{

placeBtn("ThumbA1.jpg", 400, -20, PlacaInferior, "opt1A");
        placeBtn("ThumbA2.jpg", 550, -20, PlacaInferior, "opt2A");
        placeBtn("ThumbA3.jpg", 700, -20, PlacaInferior, "opt3A");
        
}

thanks a lot in advance