gistfile1.txt

var delay = 5000;
var transition = 40;
var imageContainer = 'jw-sir';
var d=document, imgs = new Array(), zInterval = null, current=0, pause=false;

function init() {
  if(!d.getElementById || !d.createElement)return;
  imgs = d.getElementById(imageContainer).getElementsByTagName("img");
  for(i=1;i<imgs.length;i++) imgs[i].xOpacity = 0;
  imgs[0].style.display = "block";
  imgs[0].xOpacity = .99;
  setTimeout(so_xfade,delay);
}

# -----------------------------------------
# Crossfade two images
# -----------------------------------------
function so_xfade() {
  cOpacity = imgs[current].xOpacity + .3;
  nIndex = imgs[current+1]?current+1:0;
  nOpacity = imgs[nIndex].xOpacity;
  cOpacity-=.05; 
  nOpacity+=.05;
  imgs[nIndex].style.display = "block";
  imgs[current].xOpacity = cOpacity;
  imgs[nIndex].xOpacity = nOpacity;
  setOpacity(imgs[current]); 
  setOpacity(imgs[nIndex]);
  if(cOpacity<=0) {
    imgs[current].style.display = "none";
    current = nIndex;
    setTimeout(so_xfade,delay);
  } else {
    setTimeout(so_xfade,transition);
  }
  function setOpacity(obj) {
    if(obj.xOpacity>.99) {
      obj.xOpacity = .99;
      return;
    }
    obj.style.opacity = obj.xOpacity;
    obj.style.MozOpacity = obj.xOpacity;
    obj.style.filter = "alpha(opacity=" + (obj.xOpacity*100) + ")";
  }
}

window.onload = function ( e ) {
  init();
};