function ajax(url,target) {
    // native XMLHttpRequest object
    //document.getElementById(target).innerHTML = '';
    if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
        req.onreadystatechange = function() {ajaxDone(target);};
        req.open("GET", url, true);
        req.send(null);
    // IE/Windows ActiveX version
    } else if (window.ActiveXObject) {
        req = new ActiveXObject("Microsoft.XMLHTTP");
        if (req) {
            req.onreadystatechange = function() {ajaxDone(target);};
            req.open("GET", url, true);
            req.send();
        }
    }
  }

  function ajaxDone(target) {
    ajaxobj = document.getElementById(target);
    if (req.readyState == 4) {
      if (req.status == 200) {
        results = req.responseText;
        ajaxobj.innerHTML = results;
      } else {
        ajaxobj.innerHTML="ajax error:\n" + req.statusText;
      }
    }
  }