function callAHAH(url, pageElement, callMessage, errorMessage) {
  document.getElementById(pageElement).innerHTML = callMessage;

  try {
    req = new XMLHttpRequest();
    /* e.g. Firefox */

  } catch(e) {
    
    try {
      req = new ActiveXObject("Msxml2.XMLHTTP");
    
    /* some versions IE */
    } catch (e) {
      try {
        req = new ActiveXObject("Microsoft.XMLHTTP");
    
      /* some versions IE */
      } catch (E) {
        req = false;
      }
    }
  }

  req.onreadystatechange = function() {responseAHAH(pageElement, errorMessage);};
  req.open("GET",url,true);
  req.send(null);
}

function responseAHAH(pageElement, errorMessage) {
  if(req.readyState == 4) {
    if(req.status == 200) {
      output = req.responseText;
      document.getElementById(pageElement).innerHTML = output;
    } else {
      document.getElementById(pageElement).innerHTML = errorMessage+"\n"+responseText;
    }
  }
}