anchor.diff:                              });
   
                           var outputTable = "<table cellspacing='0' id='vacationOverviewTable' class='list-table sortable tablesorter vacationOverview-table'>";
  -					outputTable += "<thead class='hidden-xs'>";
  +                        outputTable += "<thead class='hidden-xs'>";
                           outputTable += "<tr>";
  -					outputTable += "<th class='sortable-field'><spring:message code='person.data.firstName'/></th>";
  -					outputTable += "<th class='sortable-field'><spring:message code='person.data.lastName'/></th>";
  +                        outputTable += "<th class='sortable-field'><spring:message code='person.data.firstName'/></th>";
  +                        outputTable += "<th class='sortable-field'><spring:message code='person.data.lastName'/></th>";
                           overViewList[0].days
                               .forEach(
                                   function (item, index, array) {
  
positive.code:                             .forEach(
                                  function (item, index, array) {
                                      outputTable += "<tr>";
  										outputTable += "<td class='hidden-xs'>"
                                          + item.person.firstName
  												+ "</td>";
  										outputTable += "<td class='hidden-xs'>"
  												+ item.person.lastName
                                          + "</td>";
                                      item.days
                                          .forEach(
  
negative.code:                                     outputTable += "</tr>";
                                  }, outputTable);
  
                          outputTable += "</tbody></table>";
                          var element = document.getElementById("vacationOverview");
                          element.innerHTML = outputTable;
                      }
                  }
  
                  $("table.sortable").tablesorter({
                      sortList: [[0, 0]],
                      headers: {
                          '.non-sortable': {
                              sorter: false
                          }
                      }
                  });
              }
  
              var selectedYear = document.getElementById('yearSelect');
              var selectedMonth = document.getElementById('monthSelect');
              var selectedDepartment = document.getElementById('departmentSelect');
  
              selectedYear.addEventListener("change", function () {
                  selectedItemChange();
  