var image1 = new Image;
var image2 = new Image;
var image3 = new Image;
var image4 = new Image;
image1.src = "images/img1.jpg";
image2.src = "images/img2.jpg";
image3.src = "images/test-1.jpg";
image4.src = "images/test-2.jpg";

var frame = new Array(image1,image2,image3,image4);
var delay = new Array(4000,4000,4000,4000);
var numframes = frame.length;
var curframe = 0;

function animateBanner()
{
   if(document.myBanner.complete)
   {
      curframe++;
      if(curframe == numframes) curframe = 0;
      document.myBanner.src = frame[curframe].src;
      setTimeout("animateBanner()",delay[curframe]);
   }  
}