function updatePCal(cal){
  var day = cal.date.getDate();
  var month = cal.date.getMonth() + 1;
  var year = cal.date.getFullYear();
  day   = day < 10 ? "0"+day : day;
  month =month < 10 ? "0"+month : month;
  location.href=requestURL + '?day=' + day + '&month='+month  + '&year='+year;
}