var current_image = 0;
function nextImage ()
{
	var next = current_image+1;
	var c = 3;
	
	if(next > (c-1))
	{
		changer(0);
	}
	else
	{
		changer(next);
	}
}


function changer (num)
{
	clearTimeout(timeoutId);
	timeoutId = setTimeout("nextImage()", 6000);
	current_image = num;
	
	images = new Array();
	urls = new Array();
	count = 3;
	images[0] = "/images/home/visumwinkel_ad.jpg";
	urls[0] = "/";
	document.getElementById("circle_ad0").src = "/images/home/circle_ad_clear.png";
	
		images[1] = "/images/home/visumwinkel_ad2.jpg";
	urls[1] = "/";
	document.getElementById("circle_ad1").src = "/images/home/circle_ad_clear.png";
	
		images[2] = "/images/home/visumwinkel_ad3.jpg";
	urls[2] = "/";
	document.getElementById("circle_ad2").src = "/images/home/circle_ad_clear.png";
	
	var d = document.getElementById("main_ad");
	document.getElementById("circle_url").href = urls[num];
	document.getElementById("circle_ad" + num).src = "/images/home/circle_ad_white.png";
	document.getElementById("circle_ad" + num).onmouseout = "this.src='/images/home/circle_ad_white.png'";
	d.src = images[num];
}

var timeoutId = setTimeout("nextImage()", 6000);