function setCookie(name, value, daysExpire) {
  if(daysExpire) {
    var expires = new Date();
    expires.setTime(expires.getTime() + 1000*60*60*24*daysExpire);
  }
  document.cookie = name + "=" + escape(value) + (daysExpire == null ? "" : (";expires=" + expires.toGMTString())) + ";path=/";
}