//change the opacity for different browsers
function changeOpac(opacity, id) {
    var object = document.getElementById(id).style;
    object.opacity = (opacity / 100);
    object.MozOpacity = (opacity / 100);
    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, 100, millisec);
    } else {
        opacity(id, 100, 0, millisec);
    }
} 

function blendimage(divid, imageid, imagefile, millisec) {
    var speed = Math.round(millisec / 100);
    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++;
    }
}

function currentOpac(id, opacEnd, millisec) {
    //standard opacity is 100
    var currentOpac = 100;
    
    //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(); 
var slideLinks = new Array();
function RunSlideShow(divid,imageid,imageFiles,displaySecs,linkid,links)
{
	var imageSeparator = imageFiles.indexOf(";");
	//alert(links);
	var linkSeparator = links.indexOf(";");
	var nextImage = imageFiles.substring(0,imageSeparator);
	var nextlink = links.substring(0,linkSeparator);
	
	//changeOpac(0, imageid);
	blendimage(divid,imageid,nextImage,940);
	
	document.getElementById(linkid).href = nextlink;
	
	var futureImages= imageFiles.substring(imageSeparator+1,imageFiles.length)+ ';' + nextImage;
	var futureLinks= links.substring(linkSeparator+1,links.length)+ ';' + nextlink;
	//alert(futureLinks);
	setTimeout("RunSlideShow('"+divid+"','"+imageid+"','"+futureImages+"',"+displaySecs+",'"+linkid+"','"+futureLinks+"')",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;
	}


}