/*  
    jscript_random_image.js - random image rotation - version date: May 2007
*/

/*************************************************************************
Original:  Robert Bui (astrogate@hotmail.com)
Web Site:  http://astrogate.virtualave.net 
This script and many more are available free online at
The JavaScript Source!! http://javascript.internet.com
this script was found here: http://javascript.internet.com/miscellaneous/random-image-rotator.html
*************************************************************************/

var random_interval = 5; // delay between rotating images (in seconds)
var random_display = 1; // 0 = no, 1 = yes
random_interval *= 1000;

var image_index = 0;
image_list = new Array();
//image_list[image_index++] = new imageItem("http://javascript.internet.com/img/image-cycler/01.jpg");
//image_list[image_index++] = new imageItem("http://javascript.internet.com/img/image-cycler/02.jpg");
//image_list[image_index++] = new imageItem("http://javascript.internet.com/img/image-cycler/03.jpg");
//image_list[image_index++] = new imageItem("http://javascript.internet.com/img/image-cycler/04.jpg");
// image_list array will be loaded in the calling page
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);			// returns just Image.src
}
function rotateImage(place) {
	var new_image = getNextImage();
	document[place].src = new_image;
	var recur_call = "rotateImage('"+place+"')";
	setTimeout(recur_call, random_interval);
}