var imglist = new Array("images/banner/E1.jpg","images/banner/E2.jpg","images/banner/E3.jpg","images/banner/E4.jpg");
var imgnum = 0;
var opacity = 100;
var delta = 2.5;
var intervalID;

function LaunchShuffler()
{
   var img;
   img = document.getElementById('photoimg1');
   img.src = imglist[0];

   img = document.getElementById('photoimg2');
   img.src = imglist[1];

   // wait for 2 seconds
   // set ImageFader() to run every 100 milliseconds
   window.setTimeout("intervalID = window.setInterval(\"ImageFader()\", 30);", 2000);
}

function ImageFader()
{
   var img1;
   var img2;
   var nextimgindex;

   img1 = document.getElementById('photoimg1');
   img2 = document.getElementById('photoimg2');
   opacity -= delta;
   if (opacity < 0)
   {
      opacity += 100;
      imgnum = (imgnum + 1) % imglist.length;
      nextimgindex = (imgnum + 1) % imglist.length;

      img1.src = imglist[imgnum];
      img2.src = imglist[nextimgindex];

      window.clearInterval(intervalID);
      window.setTimeout("intervalID = window.setInterval(\"ImageFader()\", 30);", 2000);
   }
   setOpacity(img1, opacity);
   setOpacity(img2, 100 - opacity);
}

function setOpacity(obj, opacity) {
     opacity = (opacity == 100)?99.999:opacity;

    //IE/Win
    //obj.style.filter = "alpha(opacity:"+opacity+")";
    obj.style.filter = "progid:DXImageTransform.Microsoft.Alpha(style=0,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;
}