function opacity(id, opacStart, opacEnd, millisec) {
	//speed for each frame
	var speed = Math.round(millisec / 100);
	var timer = 0;

	//determine the direction for the blending, if start and end are the same nothing happens
	if(opacStart > opacEnd) {
		for(i = opacStart; i >= opacEnd; i--) {
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
			timer++;
		}
	} else if(opacStart < opacEnd) {
		for(i = opacStart; i <= opacEnd; i++)
			{
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
			timer++;
		}
	}
}

//change the opacity for different browsers
function changeOpac(opacity, id)
{
var object = document.getElementById(id).style;
object.opacity = (opacity / 101);
object.MozOpacity = (opacity / 101);
object.KhtmlOpacity = (opacity / 101);
object.filter = "alpha(opacity=" + opacity + ")";
}

function blendimage(divid, imageid, imagefile, millisec)
{
var speed = Math.round(millisec / 10);
var timer = 0;

//set the current image as background
document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")";

//make image transparent
changeOpac(0, imageid);

//make new image
document.getElementById(imageid).src = imagefile;

//fade in image
for(i = 0; i <= 100; i++)
{
setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed));
timer++;
}
}

var slideCache = new Array();
function RunSlideShow(divid,imageid,imageFiles,displaySecs)
{
var imageSeparator = imageFiles.indexOf(";");
var nextImage = imageFiles.substring(0,imageSeparator);

changeOpac(0, imageid);
blendimage(divid,imageid,nextImage,100);

var futureImages= imageFiles.substring(imageSeparator+1,imageFiles.length)+ ';' + nextImage;
setTimeout("RunSlideShow('"+divid+"','"+imageid+"','"+futureImages+"',"+displaySecs+")",displaySecs*1000);

// Cache the next image to improve performance.
imageSeparator = futureImages.indexOf(";");
nextImage = futureImages.substring(0,imageSeparator);
if (slideCache[nextImage] == null)
{
slideCache[nextImage] = new Image;
slideCache[nextImage].src = nextImage;
}
}