function showBanner (index)
{
	var banner = document.getElementById("rotator_"+ index);
	if (banner == null) {
		index = 0;
		banner = document.getElementById("rotator_"+ index);
	}
	banner.style.display = "block";
	
	setTimeout(function(){ hideBanner(index); showBanner(index+1); }, 8 * 1000);
}

function hideBanner (index)
{
	var banner = document.getElementById("rotator_"+ index);
	banner.style.display = "none";
}

showBanner(0);