function GetXmlHttpObject()
{
var objXMLHttp=null;
if (window.XMLHttpRequest)
  {
  objXMLHttp=new XMLHttpRequest();
  }
else if (window.ActiveXObject)
  {
  objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
return objXMLHttp;
}

function docalendar(month,year,action,language)
{
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null){return;}
document.getElementById("ajaxcalendar").innerHTML='<table border="1" style="background-color:white"><tr><td>Loading calendar...<img src="wait.gif" /></td></tr></table>';
var url="calendar.php"+"?month="+month+"&year="+year+"&do="+action+"&lang="+language+"&sid="+Math.random();
xmlhttp.onreadystatechange=stateChanged;
xmlhttp.open("GET",url,true);
xmlhttp.send(null);
}

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

function selectday(year,month,day)
{
document.getElementById("date").value=year+'-'+month+'-'+day;
destroycalendar();
}

function destroycalendar()
{
document.getElementById("ajaxcalendar").innerHTML='';
}