var interval = 8; // delay between rotating images (in seconds)
var random_display = 1; // 0 = sequential, 1 = random
interval *= 1000;

var image_index = 0;
image_list = new Array();
image_list[image_index++] = new imageItem("images/Header.2010.1.jpg");
image_list[image_index++] = new imageItem("images/Header.2010.2.jpg");
image_list[image_index++] = new imageItem("images/Header.2010.3.jpg");
image_list[image_index++] = new imageItem("images/Header.2010.4.jpg");
image_list[image_index++] = new imageItem("images/Header.2010.5.jpg");
image_list[image_index++] = new imageItem("images/Header.2010.6.jpg");
image_list[image_index++] = new imageItem("images/Header.2010.8.jpg");
image_list[image_index++] = new imageItem("images/Header.2010.9.jpg");
image_list[image_index++] = new imageItem("images/Header.2010.10.jpg");
image_list[image_index++] = new imageItem("images/Header2011Barn.jpg");
image_list[image_index++] = new imageItem("images/Header.2010.12.jpg");
image_list[image_index++] = new imageItem("images/SunsetJune2010sm.jpg");

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_cache = image_index;
image_index = generate(0, number_of_image-1);
if(image_index == image_index_cache){
	image_index = generate(0, number_of_image-1);
}
if(image_index == image_index_cache){
	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);
}