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 / 100);
	object.filter = "alpha(opacity=" + opacity + ")";
}

function shiftOpacity(id, millisec) {
	//if an element is invisible, make it visible, else make it ivisible
	if(document.getElementById(id).style.opacity == 0) {
		opacity(id, 0, 99, millisec);
	} else {
		opacity(id, 99, 0, millisec);
	}
}
function slideimage(divid, imageid, imagefile){
	//make new image
	document.getElementById(imageid).src = imagefile;
}

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 + ")";
	document.getElementById(divid).style.backgroundRepeat = "no-repeat";

	
	
	//make image transparent
	changeOpac(0.001, imageid);

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

	//fade in image
	for(i = -1; i < 100; i++)
	{
		setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed));
		timer++;
	}
}

function currentOpac(id, opacEnd, millisec) {
	//standard opacity is 100
	var currentOpac = 99;
	
	//if the element has an opacity set, get it
	if(document.getElementById(id).style.opacity < 100) {
		currentOpac = document.getElementById(id).style.opacity * 100;
	}

	//call for the function that changes the opacity
	opacity(id, currentOpac, opacEnd, millisec)
}


var slideCache = new Array();
function RunSlideShow(divid,imageid,imageFiles,displaySecs)
{
	var browser=navigator.appName;
	//alert(browser);
    var ie = false;
		if (browser == "Microsoft Internet Explorer"){
			ie = true;
		}
		var safari = false;
		if (navigator.appVersion.search(/Safari/) != -1){
			safari = true;
		}
	var imageSeparator = imageFiles.indexOf(";");
	var nextImage = imageFiles.substring(0,imageSeparator);

	if(ie || safari){
		//changeOpac(0, imageid);
		blendimage(divid,imageid,nextImage,300);
		var futureImages= imageFiles.substring(imageSeparator+1,imageFiles.length)+ ';' + nextImage;
		setTimeout("RunSlideShow('"+divid+"','"+imageid+"','"+futureImages+"',"+displaySecs+")",displaySecs*1100);

	}
	
	else{
		slideimage(divid,imageid,nextImage);
		var futureImages= imageFiles.substring(imageSeparator+1,imageFiles.length)+ ';' + nextImage;
		setTimeout("RunSlideShow('"+divid+"','"+imageid+"','"+futureImages+"',"+displaySecs+")",displaySecs*800);

	}
	
	// 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;
	}
}