var interval = 2.5; // delay between rotating images (in seconds)
var random_display = 1; // 0 = no, 1 = yes
interval *= 1000;

var image_index = 0;
image_list = new Array();
	image_list[image_index++] = new imageItem("images/sponsors/01.png");
	image_list[image_index++] = new imageItem("images/sponsors/02.png");
	image_list[image_index++] = new imageItem("images/sponsors/03.png");
	image_list[image_index++] = new imageItem("images/sponsors/04.png");
	image_list[image_index++] = new imageItem("images/sponsors/05.png");
	image_list[image_index++] = new imageItem("images/sponsors/06.png");
	image_list[image_index++] = new imageItem("images/sponsors/07.png");
	image_list[image_index++] = new imageItem("images/sponsors/08.png");
	image_list[image_index++] = new imageItem("images/sponsors/09.png");
	image_list[image_index++] = new imageItem("images/sponsors/10.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() {
	image_index = generate(0, number_of_image-1);
	var new_image = get_ImageItemLocation(image_list[image_index]);
	return(new_image);
}

function loadRandomSponsors(p1,p2,p3,p4) {
	var img1 = getNextImage();
	var img2 = getNextImage();
	var img3 = getNextImage();
	var img4 = getNextImage();
	while(img1 == img2 || img1 == img3 || img1 == img4)
		var img1 = getNextImage();
	while(img2 == img3 || img2 == img4)
		var img2 = getNextImage();
	while(img3 == img4)
		var img3 = getNextImage();
	document[p1].src = img1;
	document[p2].src = img2;
	document[p3].src = img3;
	document[p4].src = img4;
}