// JavaScript Document
var interval = 6500;
	var random_display = 0;
	var imageDir = "WCRD/";
	var imageNum = 0;
	imageArray = new Array();
	imageArray[imageNum++] = new imageItem(imageDir + "img1.jpg");
	imageArray[imageNum++] = new imageItem(imageDir + "img2.jpg");
	imageArray[imageNum++] = new imageItem(imageDir + "img3.jpg");
	imageArray[imageNum++] = new imageItem(imageDir + "img4.jpg");
	imageArray[imageNum++] = new imageItem(imageDir + "img5.jpg");
	imageArray[imageNum++] = new imageItem(imageDir + "img6.jpg");
	imageArray[imageNum++] = new imageItem(imageDir + "img7.jpg");
	imageArray[imageNum++] = new imageItem(imageDir + "img8.jpg");
	imageArray[imageNum++] = new imageItem(imageDir + "img9.jpg");
	imageArray[imageNum++] = new imageItem(imageDir + "img10.jpg");
	imageArray[imageNum++] = new imageItem(imageDir + "img11.jpg");
	imageArray[imageNum++] = new imageItem(imageDir + "img12.jpg");
	imageArray[imageNum++] = new imageItem(imageDir + "img13.jpg");
	imageArray[imageNum++] = new imageItem(imageDir + "img14.jpg");
	var totalImages = imageArray.length;
	
	function imageItem(imageLocation){
		this.image_item = new Image();
		this.image_item.src = imageLocation;
	}
	
	function get_ImageItemLocation(imageObj){
		return(imageObj.image_item.src);
	}
	
	function randNum(x, y){
		var range = y - x + 1;
		return Math.floor(Math.random() * range) + x;
	}
	
	function getNextImage(){
		if(random_display){
			imageNum = randNum(0, totalImages-1);
		}
		else{
			imageNum = (imageNum+1) % totalImages;
		}
		var new_image = get_ImageItemLocation(imageArray[imageNum]);
		return (new_image);
	}
	
	function getPrevImage() {
		imageNum = (imageNum-1) % totalImages;
		var new_image = get_ImageItemLocation(imageArray[imageNum]);
		return(new_image);
	}
	
	function prevImage(place) {
		var new_image = getPrevImage();
		document[place].src = new_image;
	}
	
	function switchImage(place) {
		var new_image = getNextImage();
		document[place].src = new_image;
		var recur_call = "switchImage('"+place+"')";
		timerID = setTimeout(recur_call, interval);
    }