// JScript File

var interval = 3; // delay between rotating images (in seconds)
var random_display = 0; // 0 = sequential, 1 = random
interval *= 1000;

var image_index = 0;
image_list = new Array();
image_list[image_index++] = new imageItem("Images/03113a_large.png");
image_list[image_index++] = new imageItem("Images/03103c_large.png");
image_list[image_index++] = new imageItem("Images/02110a_large.png");
image_list[image_index++] = new imageItem("Images/03104a_large.png");
image_list[image_index++] = new imageItem("Images/03107a_large.png");
image_list[image_index++] = new imageItem("Images/05112a_large.png");
image_list[image_index++] = new imageItem("Images/00101a_large.png");
image_list[image_index++] = new imageItem("Images/03108night_large.png");
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) {
        image_index = generate(0, number_of_image-1);
    }
    else {
        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.getElementById(place).src = new_image;
    var recur_call = "rotateImage('"+place+"')";
    setTimeout(recur_call, interval);
}