anchor.diff:              $("#chart_div4").hide();
   
   	        $("#chart_div" + histIndex).show();
  +            shownHistogram = histIndex;
               drawChart();
           }
           $("#hist_toggle_box").change( toggleHistograms );
  
positive.code:               legend: {
                  position: 'bottom'
                },
                hAxis: {
                  slantedTextAngle: 45
                },
  	      yAxis: {
  	      	title: 'Number of cases'
  	      },
                isStacked: true
              };
  
  
negative.code:            var histogramView4 = new google.visualization.DataView(histogramData4);
  
             if(sortPermanently) {
                 var skipLast = shownHistogram > 2;
  
                 var hv = !skipLast ? histogramView : histogramView3;
                 var hv2 = !skipLast ? histogramView2 : histogramView4;
  
                 var sortedIndex = sumSort(hv, skipLast);
                 histogramView.setRows(sortedIndex);
                 histogramView3.setRows(sortedIndex);
                 var sortedIndex2 = sumSort(hv2, skipLast);
                 histogramView2.setRows(sortedIndex2);
                 histogramView4.setRows(sortedIndex2);
             }
  