var step = 10;
var delay = 50;
function fadeImageIn (img) {
  if (document.all || navigator.appName == 'Netscape' && parseFloat
(navigator.appVersion) >= 5) {
    img.opacity = 0;
    setOpacity(img.name);
  }
}
function fadeImageOut (img) {
  if (document.all || navigator.appName == 'Netscape' && parseFloat
(navigator.appVersion) >= 5) {
    img.opacity = 100;
    setOpacity(img.name, -step);
  }
}
function setOpacity (imgName, step, delay) {
  if (!step)
    step = window.step;
  if (!delay)
    delay = window.delay;
  var img = document.images[imgName];
  	img.opacity += step;
  if (document.all)
    	img.style.filter = 'alpha(opacity = ' + img.opacity + ')';
  else if (navigator.appName == 'Netscape' && parseFloat(navigator.appVersion) >= 5)
    	img.style.MozOpacity = img.opacity + '%';
  if (step > 0 && img.opacity < 100 || step < 0 && img.opacity > 10)
    	setTimeout('setOpacity("' + img.name + '",' + step + ', ' + delay + ')', delay);
}