var loadFailed = false;
function CacheImage(ImageSource)
{ // TURNS THE STRING INTO AN IMAGE OBJECT
	var ImageObject = new Image();
	ImageObject.onerror = function(evt)
	{
		loadFailed = true;
	}
	ImageObject.src = ImageSource;
	return ImageObject;
}

function ShowSlide(Direction)
{
	if (SlideReady)
	{
		NextSlide = CurrentSlide + Direction;
		// THIS WILL DISABLE THE BUTTONS (IE-ONLY)
		document.SlideShow.Previous.disabled = (NextSlide == 0);
		document.SlideShow.Next.disabled = (NextSlide == (Slides.length - 1));
		if ((NextSlide >= 0) && (NextSlide < Slides.length))
		{
			document.images['Screen'].src = Slides[NextSlide].src;
			var imagetitle = document.getElementById('phototitle');
			imagetitle.innerHTML = Titles[NextSlide];
			CurrentSlide = NextSlide++;
			Message = 'Picture ' + (CurrentSlide + 1) + ' of ' + Slides.length;
			self.defaultStatus = Message;
			if (Direction == 1)
				CacheNextSlide();
		}
		return true;
	}
}

function Download()
{
	if (Slides[NextSlide].complete || loadFailed)
	{
		SlideReady = true;
		self.defaultStatus = Message;
	}
	else
		setTimeout("Download()", 100); // CHECKS DOWNLOAD STATUS EVERY 100 MS
	return true;
}

function CacheNextSlide()
{
	if ((NextSlide < Slides.length) && (typeof Slides[NextSlide] == 'string'))
	{ // ONLY CACHES THE IMAGES ONCE
		SlideReady = false;
		loadFailed = false;
		self.defaultStatus = 'Downloading next picture...';
		Slides[NextSlide] = CacheImage(Slides[NextSlide]);
		Download();
	}
	return true;
}

function StartSlideShow()
{
	CurrentSlide = -1;
	Slides[0] = CacheImage(Slides[0]);
	SlideReady = true;
	ShowSlide(1);
}