function setOpacity(obj, opacity) {
    opacity = (opacity == 100)?99.999:opacity;
    obj.style.filter = "alpha(opacity:"+opacity+")";
    obj.style.KHTMLOpacity = opacity/100;
    obj.style.MozOpacity = opacity/100;
    obj.style.opacity = opacity/100;
} 
 function FadeIn(obj,In)
  {
	
	if(In==null)
	{
		if(document.getElementById(obj).src==bURL) 
			return;
		In=0;
		timeout=1000;
    }
    else
    	timeout=30;
    var fadeDelta = 100 / 50;
	
	// fade top out to reveal bottom image
	if (In > 100-2*fadeDelta ) 
	{
	  In = 0;
	  return;
	}
	else
	{
	  In += fadeDelta;
	  setOpacity(document.getElementById(obj),In);
	  setTimeout("FadeIn('"+obj+"',"+In+")",timeout);
	}
  }