function ajax(getUrl) {
  if(window.XMLHttpRequest) 
    xhr_object = new XMLHttpRequest();
  else if(window.ActiveXObject)
    xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
  else
    return(false);
  xhr_object.open("GET", getUrl, false);
  xhr_object.send(null);
  if(xhr_object.readyState == 4) return(xhr_object.responseText);
  else return(false);
}