// JavaScript Document
var interval = 2.5; // delay between rotating images (in seconds)
var random_display = 1; // 0 = no, 1 = timed, -n = freeze at abs(n-1)
interval *= 1000;

var image_index = 0;
image_list = new Array();
image_list[image_index++] = new imageItem("./images/Page-1_web.gif");
image_list[image_index++] = new imageItem("./images/Page-2_web.gif");
image_list[image_index++] = new imageItem("./images/Page-3_web.gif");
image_list[image_index++] = new imageItem("./images/Page-4_web.gif");
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() {
if (random_display > 0) {
image_index = generate(0, number_of_image-1);
}
else if (random_display == 0) {
image_index = (image_index+1) % number_of_image;
}
else {
image_index = -random_display - 1;
}
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, interval);
};
function freezeRotator(index) {
random_display = -(index+1);
};