function randOrd(){
return (Math.round(Math.random())-0.5); }
var pictures = new Array ("images/1.jpg", "images/2.jpg", "images/3.jpg", "images/4.jpg", "images/5.jpg", "images/6.jpg", "images/7.jpg", "images/8.jpg", "images/9.jpg", "images/10.jpg", "images/11.jpg", "images/12.jpg", "images/13.jpg", "images/14.jpg", "images/15.jpg", "images/16.jpg", "images/17.jpg", "images/18.jpg", "images/19.jpg", "images/20.jpg", "images/21.jpg", "images/22.jpg", "images/23.jpg", "images/24.jpg", "images/25.jpg", "images/26.jpg");
pictures.sort(randOrd);
var picture_num = 1;
var time = 4000;
var current_picture = new Image();
function start_show() 
{
setInterval("slideshow()", time);
current_picture.src = pictures[0];
document["rotating_picture"].src = current_picture.src;
}
function slideshow() 
{
	picture_num++;
		if (picture_num == pictures.length) 
		{
		picture_num = 0;
		}
		current_picture.src = pictures[picture_num];
		document["rotating_picture"].src = current_picture.src;
}
function switchMenuOn(obj) {
	var dm = document.getElementById(obj);
		dm.style.display = 'block';
}

function switchMenuOff(obj) {
	var dm = document.getElementById(obj);
		dm.style.display = 'none';
}