var myimages = new Array();

function preloading(){
	for (x=0; x<preloading.arguments.length; x++){
		myimages[x] = new Image();
		myimages[x].src = preloading.arguments[x];
	}
}
preloading("http://www.idfoods.com/en/images/operation_cycle01.gif","http://www.idfoods.com/en/images/operation_cycle02.gif","http://www.idfoods.com/en/images/operation_cycle03.gif","http://www.idfoods.com/en/images/operation_cycle04.gif","http://www.idfoods.com/en/images/operation_cycle05.gif");

function showPic(whichpopup) {

 	for (var i=1; i<6; i++) { 
 			
 			var popvar = "op_cyc_popup0"+i;
  			var closer = document.getElementById(popvar);
			closer.style.visibility = "hidden";
		}
 	 
  var open = document.getElementById(whichpopup);
  
  open.style.visibility = "visible";
}