var interval = 5.5; 
var random_display = 1; 
interval *= 1000;

var image_index = 0;
image_list = new Array();
image_list[image_index++] = new imageItem("banners/banner01.gif");
image_list[image_index++] = new imageItem("banners/banner02.gif");
image_list[image_index++] = new imageItem("banners/banner03.gif");
image_list[image_index++] = new imageItem("banners/banner04.gif");
image_list[image_index++] = new imageItem("banners/banner05.gif");
image_list[image_index++] = new imageItem("banners/banner06.gif");
image_list[image_index++] = new imageItem("banners/banner07.gif");
image_list[image_index++] = new imageItem("banners/banner08.gif");
image_list[image_index++] = new imageItem("banners/banner09.gif");
image_list[image_index++] = new imageItem("banners/banner10.gif");
image_list[image_index++] = new imageItem("banners/banner11.gif");
image_list[image_index++] = new imageItem("banners/banner12.gif");
image_list[image_index++] = new imageItem("banners/banner13.gif");
image_list[image_index++] = new imageItem("banners/banner14.gif");
image_list[image_index++] = new imageItem("banners/banner15.gif");
image_list[image_index++] = new imageItem("banners/banner16.gif");
image_list[image_index++] = new imageItem("banners/banner17.gif");
image_list[image_index++] = new imageItem("banners/banner18.gif");
image_list[image_index++] = new imageItem("banners/banner19.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);
}