var xmlHttp = null;

function showEvent(id) {
  var url = "resources/calendar.class.php?type=display&id="+id;
  xmlHttp = GetXmlHttpObject();
  xmlHttp.onreadystatechange = function(){
    if (xmlHttp.readyState == 4 || xmlHttp.readyState == "complete"){ 
      document.getElementById("col-left").innerHTML = xmlHttp.responseText
    }
  }
  xmlHttp.open("GET",url,true);
  xmlHttp.send(null);
}

function updateCalendar(m,y) {
  var url = "resources/calendar.class.php?month="+m+"&year="+y;
  xmlHttp = GetXmlHttpObject();
  xmlHttp.onreadystatechange = function(){
    if (xmlHttp.readyState == 4 || xmlHttp.readyState == "complete"){ 
      document.getElementById("calendar").innerHTML = xmlHttp.responseText
    }
  }
  xmlHttp.open("GET",url,true);
  xmlHttp.send(null);
}