anchor.diff:      <div class="row">
         <div class="col-md-12">
           <div id="pdd"></div>
  +        <span id="pdd_no_data" style="display: none;">No data available</span>
         </div>
       </div>
       <div class="row">
  
positive.code:     selectMonth(selectedMonth);
  
      yearlyPerProjectChart.load({json: yearlyPerProjectData, unload: true});
      
      drillDownChart.unload();
    }
  
    function loadYear(year) {
  
negative.code:     return true;
    }
  
    function toggleChart(chart_id, replacement_id, chartData) {
      if(isDataEmpty(chartData)) {
        $(chart_id).hide();
        $(replacement_id).show();
      }
      else {
        $(chart_id).show();
        $(replacement_id).hide();
      }
    }
  
    function selectMonth(month) {
      selectedMonth = month;
      monthlyPerProjectChart.resize({width: 400, height: 300});
      monthlyPerProjectChart.load({json: monthlyPerProject[month], unload: true});
      monthlyPerProjectChart.flush();
      $('#month-selection-header').text($('.month-'+month).text());
  
      toggleChart('#mpp', '#mpp_no_data', monthlyPerProject[month])
    }
  
    function parseData(data) {
  