// set these variables to first and last image:
var first = 1;
var last = 2;
var delayIn100thSeconds = 500;

var img = new Array();

// initialize the array with images and corresponding links:
img[1] = "img/banner1.png";
img[2] = "img/banner2.png";

var slideNumber = 0;

function showNextSlide()
{
  slideNumber++
  if (slideNumber > last ) // if past last slide, reset to first:
  {
    slideNumber = first ;
  }

  document.screen.src = img[slideNumber]; // send slide to screen
// pause
  setTimeout("showNextSlide()",delayIn100thSeconds * 10);
}