Mine

import mx.transitions.Tween;
import mx.transitions.easing.*;

_global.i=0;

function loadPic(){
	i++;
	trace("loadPic function called");
	trace ("i = " + i);
	
var myLoader:MovieClipLoader = new MovieClipLoader();
var myListener:Object = new Object ();

	myListener.onLoadStart = function (){
		trace("started loading" );
	}
	myListener.onLoadProgress = function(target_mc, loadedBytes, totalBytes){
		percent = Math.floor( loadedBytes / totalBytes * 100);
		//loadbar._visible = true;
		//loadbar.gotoAndStop( percent );
		trace ( percent );
		
		
	}
	myListener.onLoadInit = function (){
		trace ("Loaded!!!!");
		loadbar._visible = false;
		photosTween = new Tween(photos,"_alpha",Strong.easeOut,0,100,3,true);
	}

photoPath = "flash" + i + ".jpg";	
	trace ("photoPath = " + photoPath);
// add the listener object to the movieCLipLoader
myLoader.addListener(myListener);
myLoader.loadClip(photoPath, photos);
}

loadPic();

setInterval(loadPic,5000);