function bannerAdShow() {
  initImage('bannerAd1',6000);
  setTimeout("initImage('bannerAd2',6000)",8500);
  setTimeout("initImage('bannerAd3',6000)",17000);
  setTimeout("initImage('bannerAd4',6000)",25500);
  setTimeout("bannerAdShow()", 34000);
  }


function initImage(imageId,interval) { 
  image = document.getElementById(imageId);
 setOpacity(image, 0);
  image.style.display = 'inline';
  fadeIn(imageId,0); 
  window.setTimeout("fadeOut('"+imageId+"'," + "100" + ")",interval);  /* number of ms for the pic */
  }

function setOpacity(obj, opacity) {
    opacity = (opacity == 100)?99.999:opacity;
  // IE/Win
    obj.style.filter = "alpha(opacity:"+opacity+")";
  // Safari<1.2, Konqueror
    obj.style.KHTMLOpacity = opacity/100;
  // Older Mozilla and Firefox
    obj.style.MozOpacity = opacity/100;
  // Safari 1.2, newer Firefox and Mozilla, CSS3
    obj.style.opacity = opacity/100;
  }

function fadeIn(objId,opacity) {
  if (document.getElementById) {
    obj = document.getElementById(objId);
    if (opacity <= 100) {
      setOpacity(obj, opacity);
      opacity += 10;
      window.setTimeout("fadeIn('"+objId+"',"+opacity+")", 100);  /* fade-in is 1 sec */
    }
  }
}

function fadeOut(objId,opacity) {
  if (document.getElementById) {
    obj = document.getElementById(objId);
    if (opacity >= 0) {
      opacity = opacity - 10;
      setOpacity(obj, opacity);
      window.setTimeout("fadeOut('"+objId+"',"+opacity+")", 100);  /* fade-out is 1 sec */
      }
    else {
      obj.style.display = "none";
      }
   }
}