function hidePopup(divname) {
var popup;
 if(document.all) {
 	popup=document.all[divname].style;
	if(popup.visibility!="hidden"){
		popup.visibility = "hidden";
	}
  }
 else if(document.getElementById) {
 	popup=document.getElementById(divname).style;
	if(popup.visibility!="hidden"){
		popup.visibility = "hidden"; 
	}
   }
}
var t;
function hidePopupDelay(divname) {
t=setTimeout("hidePopup('"+divname+"')",800);
}
  function showPopup(divname) {
clearTimeout(t);
var popup;
if (document.all) {
  popup=document.all[divname].style;
   popup.visibility = "visible";
   }
else if (document.getElementById) {
 	popup=document.getElementById(divname).style;
   popup.visibility = "visible"; 
   }
	if(divname=='menu1'){
	hidePopup('menu2');
	hidePopup('menu3');
	}
	else if(divname=='menu2'){
	hidePopup('menu1');
	hidePopup('menu3');
	}
	else if(divname=='menu3'){
	hidePopup('menu1');
	hidePopup('menu2');
	}
}