var lastSub = '';
 
 function setCookie(name, value, expires, path, domain, secure) {
  var never = new Date()
  never.setTime(never.getTime() + 2000*24*60*60*1000);
  if (expires != null && expires == 'never') expires = never;
  var curCookie = name + "=" + escape(value) +
  ((expires) ? "; expires=" + expires.toGMTString() : "") +
  ((path) ? "; path=" + path : "") +
  ((domain) ? "; domain=" + domain : "") +
  ((secure) ? "; secure" : "");
  document.cookie = curCookie;
 }

 function getCookie(name) { 
  var search = name + "=";
  var returnvalue = "";
  if (document.cookie.length > 0) {
   offset = document.cookie.indexOf(search);
  
   if (offset != -1) { 
    offset += search.length;
    end = document.cookie.indexOf(";", offset);
    if (end == -1) end = document.cookie.length;
    returnvalue=unescape(document.cookie.substring(offset, end));
   }
  }

  return returnvalue;
 }

 function openSubMenu(id, url) {
 	if (id == '' || document.getElementById(id) == null) return;
	setCookie('submenu', id); 

	if (lastSub != '') document.getElementById(lastSub).style.display = 'none';
	document.getElementById(id).style.display = '';
	lastSub = id;
	
	if (url != null) document.location = url;
 }