function OpenDocument(url,handleHttpResponseFunction){
  http.open("GET", url, true);
  if (handleHttpResponseFunction!='') eval("http.onreadystatechange = "+handleHttpResponseFunction);
  http.send(null);
  return;
}

function getHTTPObject() {
  var xmlhttp;
  if(window.XMLHttpRequest){
    xmlhttp = new XMLHttpRequest();
  }else if (window.ActiveXObject){
    xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    if (!xmlhttp){
      xmlhttp=new ActiveXObject("Msxml2.XMLHTTP");
    }
  }
  return xmlhttp;
}
var http = getHTTPObject();

function CalendarShow(URL){
  OpenDocument(URL,"function () { if (http.readyState == 4){document.getElementById('Calendar').innerHTML=http.responseText;};}");
}