anchor.diff:      border:1px solid #bbb;
       overflow:hidden;
       word-break:normal;
  +    box-sizing: border-box;
     }
     .su-wayback-m-years td > div, .su-wayback-m-months td > div, .su-wayback-m-days td > div {
       background: #555;
  
positive.code:       determineFrequencyClass(value);
        month_label = getMonthLabel(key);
        // console.log("key: " +key + ", value: " + value + " month label: " + month_label);
  
        var cell = $('<td class="su-wayback-m-frequency ' + freq_class + '" data-toggle="tooltip" data-placement="top" data-container="body" data-year="' + target_year + '" data-key="' + key + '" data-original-title="' +  month_label + " " + target_year + ': ' + value +  ' captures" title=""><div style="opacity: 0;">&nbsp;</div></td>')
        $("#su-wayback-m-month-data").append(cell);
          $("[data-toggle='tooltip']").tooltip();
      });
    });
    
    // When a month is clicked, create cells for the DAYS visualization.
    $(document).on('click', '#su-wayback-m-month-data td', function () {
      $("#su-wayback-m-month-data td > div").css("opacity", "0");
      $(this).find("div").css("opacity", "1");
      $(".su-wayback-m-day-display").css("display", "block");
  
negative.code:       // convert day value to int from string
        determineFrequencyClass(parseInt(day_value, 10));
        var day_label = i + 1; // adjust for zero-based index; days start with 1
        if (freq_class.indexOf("captures")>=0) {
          var cell = $('<td class="su-wayback-m-frequency ' + freq_class + '" data-toggle="tooltip" data-placement="top" data-container="body" data-original-title="' + month_label + " " + day_label + ", " + target_year + ': ' + day_value +  ' captures" title=""><a href="<%= replayPrefix %>'+target_year+target_month+day_label+'120000/'+'<%=searchUrlSafe%>" style="z-index: 100001;"><div style="opacity: 0;">&nbsp;</div></a></td>');
        } else {
            var cell = $('<td class="su-wayback-m-frequency ' + freq_class + '"><div style="opacity: 0;">&nbsp;</div></td>');
        }
        $("#su-wayback-m-day-data").append(cell);
        $("[data-toggle='tooltip']").tooltip();
      }
  