var interval =  3;
var random_display = 1;

interval *= 1000;

var image_index = 0;
image_list = new Array();

image_list[image_index++] = new imageItem("images/poweredby/poweredby_1.gif");
image_list[image_index++] = new imageItem("images/poweredby/poweredby_2.gif");
image_list[image_index++] = new imageItem("images/poweredby/poweredby_3.gif");
image_list[image_index++] = new imageItem("images/poweredby/poweredby_4.gif");
image_list[image_index++] = new imageItem("images/poweredby/poweredby_5.gif");
image_list[image_index++] = new imageItem("images/poweredby/poweredby_6.gif");
image_list[image_index++] = new imageItem("images/poweredby/poweredby_7.gif");
image_list[image_index++] = new imageItem("images/poweredby/poweredby_8.gif");
image_list[image_index++] = new imageItem("images/poweredby/poweredby_9.gif");
image_list[image_index++] = new imageItem("images/poweredby/poweredby_10.gif");
image_list[image_index++] = new imageItem("images/poweredby/poweredby_11.gif");
image_list[image_index++] = new imageItem("images/poweredby/poweredby_12.gif");
image_list[image_index++] = new imageItem("images/poweredby/poweredby_13.gif");
image_list[image_index++] = new imageItem("images/poweredby/poweredby_14.gif");
image_list[image_index++] = new imageItem("images/poweredby/poweredby_15.gif");
image_list[image_index++] = new imageItem("images/poweredby/poweredby_16.gif");
image_list[image_index++] = new imageItem("images/poweredby/poweredby_17.gif");
image_list[image_index++] = new imageItem("images/poweredby/poweredby_18.gif");
image_list[image_index++] = new imageItem("images/poweredby/poweredby_19.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) {
		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[place].src = new_image;
	var recur_call = "rotateImage('"+place+"')";
	setTimeout(recur_call, interval);
}

function startRotator()
{
    rotateImage('rImage');
}

window.onload=startRotator;