function setCookie(cookieName,cookieValue,nDays) {
 //window.alert ("Nome: " + cookieName+"  Valor: " + cookieValue+"  Dias: " + nDays)
 var today = new Date();
 var expire = new Date();
 if (nDays==null || nDays==0) nDays=1;
 expire.setTime(today.getTime() + 3600000*24*nDays);
 document.cookie = cookieName+"="+escape(cookieValue)
                 + ";expires="+expire.toGMTString();
}


function getCookie(cookie_name)
{
  if (!document.cookie.match(eval("/" + escape(cookie_name) + "=/")))
  {
   return false;
  }

return unescape(document.cookie.replace(eval("/^.*?" + escape(cookie_name) + "=([^\\s;]*).*$/"), "$1"));
}