var dimages=new Array();
var numImages=5;
for (i=0; i<numImages; i++)
{
  dimages[i]=new Image();
  dimages[i].src="../client/images/promos/promo_0"+(i+1)+".jpg";
}
var curImage=-1;


function swapPicture()
{
  if (document.images)
  {
    var nextImage=curImage+1;
    if (nextImage>=numImages)
      nextImage=0;
    if (dimages[nextImage] && dimages[nextImage].complete)
    {
      var target=0;
      if (document.images.promo_image)
        target=document.images.promo_image;
      if (document.all && document.getElementById("promo_image"))
        target=document.getElementById("promo_image");

      // make sure target is valid.  It might not be valid
      //   if the page has not finished loading
      if (target)
      {
        target.src=dimages[nextImage].src;
        curImage=nextImage;
      }

      t=setTimeout("swapPicture()", 6000);

    }
    else
    {
      t=setTimeout("swapPicture()", 500);
    }
  }
}

t=setTimeout("swapPicture()", 2000);