//adapted version of 'preloaded slideshow script' by Jason Moon - http://www.dynamicdrive.com/dynamicindex14/preloadslide.htm
	//original version could only go from beginning to end and back
	//this version goes to the first picture if your at the last picture and click next, identical behavior for the first picture

	function CacheImage(ImageSource)
	{
		var ImageObject = new Image();
		ImageObject.src = ImageSource;
		return ImageObject;
	}

	function ShowSlide(Direction)
	{
		if (SlideReady)
		{
			if ((CurrentSlide == -1) && (Slides.length > 1))
			{
				Slides[Slides.length-1] = CacheImage(Slides[Slides.length-1]);
			}

			if ((CurrentSlide == 0) && (Direction == -1))
			{
				NextSlide = Slides.length + Direction
				document.images['Screen'].src = Slides[NextSlide].src;
				CurrentSlide = Slides.length-1
			}
			else
			{
				NextSlide = CurrentSlide + Direction;

				if ((NextSlide >= 0) && (NextSlide < Slides.length))
				{
					document.images['Screen'].src = Slides[NextSlide].src;
					CurrentSlide = NextSlide++;

					if (Direction == 1) CacheNextSlide();
				}
				else if (NextSlide == Slides.length)
				{
					document.images['Screen'].src = Slides[Slides.length-NextSlide].src;
					CurrentSlide = 0;
				}
				return true;
			}
		}
	}

	function Download()
	{
		if (Slides[NextSlide].complete)
		{
			SlideReady = true;
		}
		else setTimeout("Download()", 100);
		return true;
	}


	function CacheNextSlide()
	{
		if ((NextSlide < Slides.length) && (typeof Slides[NextSlide] == 'string'))
		{
			SlideReady = false;
			Slides[NextSlide] = CacheImage(Slides[NextSlide]);
			Download();
		}
		return true;
	}

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