var imageArray = new Array(9); //for images, increase size as necessary
var counter = 1;
if(document.images) //pre-load all  images
{
  for(i = 0; i < 9; i++)
  {
    imageArray[i] = new Image(100, 100);
    imageArray[i].src = "images/image0" + (i+1) + ".jpg"; 
  }
}


function changeImage() //banner changer function
{
  if(counter > 8)
   counter = 0;

  document.image.src = imageArray[counter].src; //sets a new image
 
  counter++; //increase the counter for the next image
  }
var timer = window.setInterval("changeImage()", 2000);