var xmlhttp

function getData(f){
 xmlhttp=GetXmlHttpObject();
 if (xmlhttp==null){
  alert ("Your browser does not support AJAX!");
  return;
  }
 var url=f;
 xmlhttp.onreadystatechange=stateChanged;
 xmlhttp.open("GET",'/xmlFiles/'+url,true);
 xmlhttp.send(null);
}

function stateChanged(){
 if (xmlhttp.readyState==4){
  document.getElementById("bubbelBody").innerHTML=xmlhttp.responseText;
 }
}

function GetXmlHttpObject(){
 if (window.XMLHttpRequest){
  // code for IE7+, Firefox, Chrome, Opera, Safari
  return new XMLHttpRequest();
 }
 if (window.ActiveXObject){
  // code for IE6, IE5
  return new ActiveXObject("Microsoft.XMLHTTP");
 }
return null;
}