function VymenObrazek(adnum)
{
	window.setTimeout('adRotate(' + adnum + ')', 3000);
}

function adRotate(adnum)
{
	var adid = 'ad_container_' + adnum;
	var currentad = document.getElementById(adid);
	var siblings = currentad.parentNode.childNodes;
	var siblingads = new Array(); 
	var arrcntr = 0;
	for(var idx = 0; idx < siblings.length; idx++)
	{
		if(siblings[idx].id&&siblings[idx].id.length>13&&siblings[idx].id.substring(0,13)=='ad_container_')
			siblingads[arrcntr++] = siblings[idx];
	}

	for(var idx = 0; idx < siblingads.length; idx++)
	{
		if(siblingads[idx].id==adid)
		{
			var nextad = (idx < siblingads.length-1 ? siblingads[idx+1] : siblingads[0]);
			var nextnum = parseInt(nextad.id.substring(13));
			currentad.style.display = 'none';
			nextad.style.display = 'block';
			VymenObrazek(nextnum);
		}
	}
}