var bannerImg = new Array();
  // Enter the names of the images below
  bannerImg[0]="images/banner_heartland.jpg";
  bannerImg[1]="images/banner_rockmit.jpg";
  bannerImg[2]="images/banner_shotcrete.jpg";
  bannerImg[3]="images/banner_soilstab2.jpg";
  bannerImg[4]="images/banner_soilstab3.jpg";
  bannerImg[5]="images/banner_soilstab4.jpg";
  bannerImg[6]="images/banner_soilstab.jpg";
  bannerImg[7]="images/banner_sunsettunnel.jpg";
  bannerImg[8]="images/banner_tunnel2.jpg";
  bannerImg[9]="images/banner_tunnel3.jpg";
  bannerImg[10]="images/banner_tunnel.jpg";
  bannerImg[11]="images/banner_mullen1.jpg";
  bannerImg[12]="images/banner_mullen2.jpg";
  bannerImg[13]="images/banner_heartland2.jpg";
  bannerImg[14]="images/banner_heartland3.jpg";

var newBanner = 0;
var totalBan = bannerImg.length;

function cycleBan() {
  newBanner++;
  if (newBanner == totalBan) {
    newBanner = 0;
  }
  document.banner.src=bannerImg[newBanner];
  // set the time below for length of image display
  // i.e., "2*1000" is 4 seconds
  setTimeout("cycleBan()", 6*1000);
}
window.onload=cycleBan;