var current="0", s=5000, currentteaser="";

function replaceBanner()
{
	
	currentteaser = document.getElementById("teaser" + current);
	if(currentteaser) currentteaser.style.visibility="hidden";
	
	if (current == 3) current=0;
	current++;
	
	currentteaser = document.getElementById("teaser" + current);
	if(currentteaser) currentteaser.style.visibility="visible";
	
	
	window.setTimeout("replaceBanner()", s);
	

}
window.onload=replaceBanner;