function setCookie(c_name,value,expiredays)
{
  var exdate=new Date();
  exdate.setDate(exdate.getDate()+expiredays);
  document.cookie=c_name+ "=" +escape(value)+
  ((expiredays==null) ? "" : ";expires="+exdate.toUTCString());
}

function toogle(idl) {
  if (document.getElementById(idl).style.display=="none") { 
    document.getElementById(idl).style.display="block";
    setCookie(idl,1,1);
  } else { 
    document.getElementById(idl).style.display="none";
    setCookie(idl,0,1);
  }
}