How to dynamically give MC an instance names?

programming flash
1

Now I have this code which is loading all the images from the xml file into a container and I need to set some ID to track which image should be opened bigger in another MC.
And I also need to use this ID to when user hovers mouse over an image it scales up a little using tweener.


private function loadThumbs():void
{
	for(var j:uint = 0; j < thumbs.length ;j++)
	{				
		MC = new MovieClip();
		MC.name = "number " + j;	
		MC.x = j * thumbsSize;
		imgLoader = new Loader();
		imgLoader.load(new URLRequest(thumbs[j]));	
		MC.addEventListener(MouseEvent.CLICK, onClick);
		MC.addEventListener(MouseEvent.MOUSE_OVER, onMouseOver);
		MC.addEventListener(MouseEvent.MOUSE_OUT, onMouseOut);
        	MC.addChild(imgLoader);
		container.addChild(MC);				
	}
        	addChild(container);
	}

When I trace MC.name at onClick event it shows the instance name.

How should I do?