http = createHTTPHandler();
  
function navigeer(id)
{
  var url = "artikellijst.php?pagina=navigeer&id=" + id;
  http.open("GET", url, true);
  http.onreadystatechange =  handleHttpResponse;
  http.send(null);

}

function handleHttpResponse()
{
  if(http.readyState == 4)
  {
    var resultaat  = http.responseText;
    document.getElementById('content').innerHTML = resultaat;
  }
}