// JavaScript Document
			var imgDir = "/media/random/";
			var cssDir = "/css/";
			var arrImage = new Array();
			var container = "left_nav";
			
			function init() {
				loadImageArray(arrImage); 
				setContainerBackground(container, arrImage[getRandomNumber(arrImage.length)]); 
			}
			
			function loadImageArray(arr) {
				arr[0] = imgDir + "pic1.gif";
				arr[1] = imgDir + "pic2.gif";
				arr[2] = imgDir + "pic3.gif";
				arr[3] = imgDir + "pic4.gif";
				arr[4] = imgDir + "pic5.gif";
			}
			
			function setContainerBackground(element, image) {
				document.getElementById(element).style.backgroundImage = "url(" + image + ")";
			}
		
			function getRandomNumber(upperBound) {
				var id = parseInt(Math.random() * 10);
				
				if (id >= upperBound) {
					return getRandomNumber(upperBound);
				} else {
					return id;
				}
			}