function randOrd(){
return (Math.round(Math.random())-0.5); }
var pictures = new Array ("images/h1.jpg", "images/h2.jpg", "images/h3.jpg", "images/h4.jpg", "images/h5.jpg", "images/h6.jpg", "images/h7.jpg", "images/h8.jpg", "images/h9.jpg", "images/h10.jpg", "images/h11.jpg", "images/h12.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';
}