var imgs1 = new Array("http://www.megamacao.com/images/banner/banner_m1.gif","http://www.megamacao.com/images/banner/banner_m2.gif");
var lnks1 = new Array("http://mega-show.com/Part1/EN/visitors_pre_registration.html","http://mega-show.com/Part2/EN/visitors_pre_registration.html");
var alt1 = new Array();
var currentAd1 = 0;
var imgCt1 = 2;
function cycle1() {
  if (currentAd1 == imgCt1) {
    currentAd1 = 0;
  }
var banner1 = document.getElementById('adBanner1');
var link1 = document.getElementById('adLink1');
  banner1.src=imgs1[currentAd1]
  banner1.alt=alt1[currentAd1]
  document.getElementById('adLink1').href=lnks1[currentAd1]
  currentAd1++;
}
  window.setInterval("cycle1()",4000);