function displayLink(visiblelink){

	document.getElementById('ad1').style.display = "none";
	document.getElementById('ad2').style.display = "none";
	document.getElementById('ad3').style.display = "none";
	document.getElementById('ad4').style.display = "none";
	document.getElementById('ad5').style.display = "none";
	
	document.getElementById('ad1').style.position = "absolute";
	document.getElementById('ad2').style.position = "absolute";
	document.getElementById('ad3').style.position = "absolute";
	document.getElementById('ad4').style.position = "absolute";
	document.getElementById('ad5').style.position = "absolute";
	
	
	document.getElementById(visiblelink).style.display = "block";
	document.getElementById(visiblelink).style.position = "relative";

}