var bannerImg = new Array();
  bannerImg[0]="AmSt1.jpg";
  bannerImg[1]="AmSt2.jpg";
  bannerImg[2]="AmSt6.jpg";
  bannerImg[3]="AmSt4.jpg";
  bannerImg[4]="AmSt5.jpg";
  bannerImg[5]="AmSt3.jpg";
  bannerImg[6]="AmSt7.jpg";

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

function cycleBan() {
  newBanner++;
  if (newBanner == totalBan) {
    newBanner = 0;
  }
  document.banner.src=bannerImg[newBanner];
  
  setTimeout("cycleBan()", 4*1000);
}
window.onload=cycleBan;