//This script courtesy of w3schools.com

function getXmlHttpObject(){
  var xmlHttp;
  try{
    // Firefox, Opera 8.0+, Safari
    xmlHttp = new XMLHttpRequest();
  }catch (e){
    // Internet Explorer
    try{
      xmlHttp = new ActiveXObject( "Msxml2.XMLHTTP" );
    }catch (e){
      try{
        xmlHttp = new ActiveXObject( "Microsoft.XMLHTTP" );
      }catch (e){
        alert( "Your browser does not support AJAX!" );
        return false;
      }
    }
  }
  return xmlHttp;
}

// DEFINE FUNCTION TO HANDLE RETURN VALUE HERE
// COPY TO NEW PAGE-SPECIFIC JAVASCRIPT FILE

// xmlHttp.onreadystatechange = function(){
//   if( xmlHttp.readyState == 4 ){
//     xmlHttp.responseText; //send this value to a DOM node for output
//   }
// }