fetchData: function(method, url)
{
  var http = JwacsLib.sendRequest(method, url, null);

  // Check for errors
  if(!(http.status == undefined ||
       http.status == 0 ||
       (http.status >= 200 && http.status < 300)))
  {
    var err = new Error("Server returned " + http.status);
    err.http = http;
    throw err;
  }

  return http.responseText;
}