var xmlHttp
var ts;
function get_cal(m, y)
{
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX, some features may be disabled.");
  return;
  }
  t = new Date();
  ts = t.getTime();
  
var url="functions/get_cal.php";
url=url+"?m="+m;
url=url+"&y="+y;
url=url+"&ts="+ts;
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function stateChanged() 
{ 
if (xmlHttp.readyState==4)
{
document.getElementById("whole_cal_wrapper").innerHTML=xmlHttp.responseText;
}

}

function GetXmlHttpObject()
{
var xmlHttp=null;
try
  {
  // Firefox, Opera 8.0+, Safari
  xmlHttp=new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
  }
return xmlHttp;
}