var imgArray = new Array();
var i=2;

function preloadImages(){
var basePath = preloadImages.arguments[0];
var clientId = preloadImages.arguments[1];
var endPath = "&Size=2";

if(basePath.length > 0)
    basePath += "/";

if(clientId.length > 0)
    endPath += "&ClientId=" + clientId;

for (x=2; x<preloadImages.arguments.length; x++){
imgArray[x] = new Image();
imgArray[x].src = basePath + "GetImage.axd?FileId=" + preloadImages.arguments[x] + endPath;
}
UpdateImage();
}

function goNext() {
if (i<imgArray.length-1) {i+=1;UpdateImage();}
else First();
}

function goPrevious() {
    if (i>2) {i-=1;UpdateImage();}
        else Last();
}

function First() {i=2;UpdateImage();}


function Last() {i=imgArray.length-1;UpdateImage();}


function UpdateImage() 
{
	var slider = document.getElementById('photoSlider');
	slider.style.backgroundImage = 'url(' + imgArray[i].src + ')';
	
	if(document.getElementById('currentPhoto'))
	    document.getElementById('currentPhoto').innerHTML = (i+1) -2; 
}