var image_index = 0;
image_list = new Array();
image_list[image_index++] = new imageItem("/images/edu-rotator/t-naylor.jpg");
image_list[image_index++] = new imageItem("/images/edu-rotator/i-swell.jpg");
image_list[image_index++] = new imageItem("/images/edu-rotator/t-ncpta.jpg");
image_list[image_index++] = new imageItem("/images/edu-rotator/i-bristol.jpg");
image_list[image_index++] = new imageItem("/images/edu-rotator/t-evans.jpg");
image_list[image_index++] = new imageItem("/images/edu-rotator/i-rugby.jpg");
image_list[image_index++] = new imageItem("/images/edu-rotator/t-foster.jpg");
image_list[image_index++] = new imageItem("/images/edu-rotator/i-dormer.jpg");

var number_of_image = image_list.length;

function imageItem(image_location) {
this.image_item = new Image();
this.image_item.src = image_location;}

function get_ImageItemLocation(imageObj) {
return(imageObj.image_item.src)}

function generate(x, y) {
var range = y - x + 1;
return Math.floor(Math.random() * range) + x;}

function getNextImage() {
image_index=(image_index+1)%number_of_image; 

var new_image = get_ImageItemLocation(image_list[image_index]);
return(new_image);}

function rotateImage(place) {
var new_image = getNextImage();
document[place].src = new_image;
var recur_call = "rotateImage('"+place+"')";
setTimeout(recur_call, 4000);}
rotateImage('rImage')