function hideThePopups() {
	for (var i=1; i<5; i++) { 
 			
 	var popvar = "promo_popup0"+i;
 	var closer = document.getElementById(popvar);
	closer.style.visibility = "hidden";
	}
}
		

function showPic(whichpopup) {
  
	hideThePopups(); 	 
	var open = document.getElementById(whichpopup);
  
	open.style.visibility = "visible";
}