function ahah (url, target) {
  document.getElementById(target).innerHTML = ' Laden...';
  if (req != undefined && req.readyState < 4) {
    window.setTimeout ("ahah ('" + url + "', '" + target + "')", 1000);
  }
  else {
    ahahrun (url, target)
  }
}

function ahahrun (url, target) {
  document.getElementById(target).innerHTML = ' Laden...';
  if (window.XMLHttpRequest) {
    req = new XMLHttpRequest();
  } else if (window.ActiveXObject) {
    req = new ActiveXObject("Microsoft.XMLHTTP");
  }
  if (req != undefined) {
    req.onreadystatechange = function() {ahahDone(url, target);};
    req.open("POST", url, true);
    req.send("");
  }
}  

function ahahDone(url, target) {
  if (req.readyState == 4) { // only if req is "loaded"
    if (req.status == 200) { // only if "OK"
      document.getElementById(target).innerHTML = req.responseText;
    } else {
      document.getElementById(target).innerHTML="";
    }
  }
}