var images = [];
	function RegisterImage(src)
	{
		images.push(src);
	}

	var imageIndex = 0;
	
	function ShowNextImage()
	{
		if(imageIndex == images.length - 1)
			imageIndex = 0;
		else
			imageIndex++;
		document.getElementById('imgMain').src = 'images/pageImages/' + images[imageIndex];
	}

	function ShowPrevImage()
	{
		if(imageIndex == 0)
			imageIndex = images.length - 1;
		else
			imageIndex--;
		document.getElementById('imgMain').src = 'images/pageImages/' + images[imageIndex];
	}