Naming mc with parameter

Hi,

I have created a function to load up my movies what I would like to do is two things

(i) change the ldr to a movieclip
(ii) add an extra parameter to add an instance name movieclip when I call the movieclip

like this…
loadMyImage(‘images/headers/logo.png’, 80, 20, ‘myheader’ );

Thanks,

loadMyImage(‘images/headers/logo.png’, 80, 20 );

      function loadMyImage(imageURL, xPos, yPos) {
    var ldr:Loader = new Loader();
    var url:String = imageURL;
     var urlReq:URLRequest = new URLRequest(url);
     ldr.load(urlReq);
    addChild(ldr);
    ldr.x= xPos;
    ldr.y= yPos;

    }