var pos; // variable for posting information
function loadXMLPosDoc(url,posData) {
  // branch for native XMLHttpRequest object
  if (window.XMLHttpRequest) {
    pos = new XMLHttpRequest();
    pos.onreadystatechange = processPosChange;
    pos.open("POST", url, false);
    pos.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
    pos.send(posData);
    // branch for IE/Windows ActiveX version
  } else if (window.ActiveXObject) {
    pos = new ActiveXObject("Microsoft.XMLHTTP");
    if (pos) {
      pos.onreadystatechange = processPosChange;
      pos.open("POST", url, false);
      pos.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
      pos.send(posData);
    }
  }
}

function grabPosXML (tagName) {
return pos.responseXML.documentElement.getElementsByTagName(tagName)[0].childNodes[0].nodeValue;
}

function processPosChange() {
  // page loaded 'complete'
  if (pos.readyState == 4) {
    // page is 'OK'
    if (pos.status == 200) {
      if ( grabPosXML('posStatus') == 'NOTOK' ) {
        alert('There were problems Sending Email.');
      }
    }
  }
}