// JavaScript Document

window.onload = rotate;

var thisAd = 0;

function rotate() {
     var adImages = new Array("images/nldco800h.jpg","images/nldco800h1.jpg","images/nldco800h2.jpg","images/nldco800h3.jpg");

     thisAd++;
     if (thisAd == adImages.length) {
        thisAd = 0;
     }
     document.getElementById("adBanner").src = adImages[thisAd];

     setTimeout(rotate, 4 * 1000);
}