ass="chart_title">Response Time Ranges</span>',
  useHTML: true
});

function numberOfRequestsDataForGroup(group) {
  var data = {names: [], oks: [], kos: []};

  $.each(group.contents, function(contentName, content) {
    if (content.type == 'GROUP') {
      var result = numberOfRequestsDataForGroup(content);
      data.names = data.names.concat(result.names);
      data.oks = data.oks.concat(result.oks);
      data.kos = data.kos.concat(result.kos);
    }
    else if (content.type == 'REQUEST') {
      da