function setCookie(name,value,days,path) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = '; expires='+date.toGMTString();
  }
  else var expires = '';
  if (!path || path == '') path = '/';
  document.cookie = encodeURIComponent(name)+'='+encodeURIComponent(value)+expires+'; path='+ path;
}