var xmlhttp;

function GetXmlHttpObject() {
  if (window.XMLHttpRequest) {
    // code for IE7+, Firefox, Chrome, Opera, Safari
    return new XMLHttpRequest();
  }
  if (window.ActiveXObject) {
    // code for IE6, IE5
    return new ActiveXObject("Microsoft.XMLHTTP");
  }
  return null;
}

function stateChanged(ajax_req, elem_id) {
  if (ajax_req.readyState == 4) {
    document.getElementById(elem_id).innerHTML = ajax_req.responseText;
  } else {
    //document.getElementById(elem_id).innerHTML = ajax_req.responseText;
    document.getElementById(elem_id).innerHTML = "<img src=\"images/loading.gif\" border=\"0\"> - " + ajax_req.readyState;
  }
}