// preloadImages
	
	var homeOverImage = getImage("images/next-over.gif");
	var homeOutImage = getImage("images/next-out.gif");
	var previousOverImage = getImage("images/previous-over.gif");
	var previousOutImage = getImage("images/previous-out.gif");
	var nextOutImage = getImage("images/next-out.gif");
	var nextOverImage = getImage("images/next-over.gif");
	var indexOutImage = getImage("images/index-out.gif");
	var indexOverImage = getImage("images/index-over.gif");
	var homeOverImage = getImage("images/home-over.gif");
	var homeOutImage = getImage("images/home-out.gif");	
	
	
	function getImage(src) {
		var img = new Image();
		img.src = src;
		return img;
	}
	
	function changeImage(imgName, newImage) {
		if (newImage.complete) {
			document.images[imgName].src = newImage.src;
		} 
	}
	
	function writeTab() {
		document.write("       ");
	}