function crossfade(divid, imageid, imagefile, numFrames, millisec) 
	{ 
    var div=document.getElementById(divid);
    var image=document.getElementById(imageid);
    
    div.style.backgroundImage = "url('" + image.src + "')";
    setOpacity( imageid, 0 );

    var speed = Math.round(millisec / 100);
    setTimeout( "document.getElementById('" + imageid + "').src = 'images/fade/" + imagefile + ".jpg'", speed /2);
    for(var i = 1; i <= 100; i++) {
        setTimeout("setOpacity('" + imageid + "'," + i + ")",(i * speed));
    }
    
    document.getElementById('slidecaption').textContent = slideCaptions[imagefile-1];
    document.getElementById('slidecaption').innerHTML = slideCaptions[imagefile-1];
    
    setTimeout("crossfade('" + divid + "','" + imageid + "'," + (imagefile == numFrames ? 1 : ++imagefile) + "," + 
    	numFrames +"," + millisec + ")", millisec*3);
	}

function setOpacity( id, opacity ) 
	{
    var style=document.getElementById(id).style;
    style.KhtmlOpacity = style.MozOpacity = style.opacity = (opacity / 100); 
    style.filter = "alpha(opacity=" + opacity + ")";
	}