anchor.diff:          reloadRssTable();
   
           function reloadRssTable() {
  -            $.getJSON(rootURL+ '/${subscriber}', function (data) {
  +            $.getJSON(rootURL + '/${subscriber}', function (data) {
                   userData = data;
   
  -                var rssTable = '<table class="table table-hover"><thead>' +
  -                    '<tr>' +
  -                    '<th style="vertical-align: initial"><input type="checkbox" class="form-check-input" id="select_all_checkbox"/></th>' +
  -                    '<th>#</th>' +
  -                    '<th>rss</th>' +
  -                    '<th>status</th>' +
  -                    '<th>last polling date</th>' +
  -                    '<th>error message</th>' +
  -                    '<th>retry count</th>' +
  -                    '</tr></thead><tbody>';
  +                var rssTable = $('<table>')
  +                    .addClass('table table-hover')
  +                    .append('<thead>' +
  +                        '<tr>' +
  +                        '<th style="vertical-align: initial"><input type="checkbox" class="form-check-input" id="select_all_checkbox"/></th>' +
  +                        '<th>#</th>' +
  +                        '<th>rss</th>' +
  +                        '<th>status</th>' +
  +                        '<th>last polling date</th>' +
  +                        '<th>error message</th>' +
  +                        '<th>retry count</th>' +
  +                        '</tr></thead>')
  +                    .append('<tbody>');
   
                   $.each(data.rsslist, function (i, item) {
  -                    var tr;
  +                    var tr = $('<tr>');
                       if (item.status === 'dead') {
  -                        tr = '<tr class="table-danger">';
  +                        tr.addClass('table-danger');
                       }
                       else if (item.status === 'offline') {
  -                        tr = '<tr class="table-warning">';
  +                        tr.addClass('table-warning');
                       }
                       else {
  -                        tr = '<tr class="table-light">';
  -                    }
  -
  -                    tr += '<td><input type="checkbox" class="form-check-input" id="' + item.rss + '"/></td><td>';
  -
  -                    rssTable += tr + (i + 1) + '</td><td>'
  -                        + '<a href="' + item.rss + '" target="_blank">' + item.rss + '</a></td><td>'
  -                        + item.status + '</td><td>'
  -                        + item.lastPollingDate + '</td><td>'
  -                        + item.errorMessage + '</td><td>'
  -                        + item.retryCount + '</td></tr>'
  -
  -                });
  -                rssTable += '</tbody></table>';
  +                        tr.addClass('table-light');
  +                    }
  +
  +                    tr.append('<td><input type="checkbox" class="form-check-input" id="' + item.rss + '"/></td>'
  +                        + '<td>' + (i + 1) + '</td>'
  +                        + '<td><a href="' + item.rss + '" target="_blank">' + item.rss + '</a></td>'
  +                        + '<td>' + item.status + '</td>'
  +                        + '<td>' + item.lastPollingDate + '</td>'
  +                        + '<td>' + item.errorMessage + '</td>'
  +                        + '<td>' + item.retryCount + '</td>');
  +
  +                    rssTable.append(tr);
  +                });
                   $("#details").html(rssTable);
   
                   $("#select_all_checkbox").change(function (e) {
  
positive.code:                     <form id="subscribers_form" action="" method="post">
                          <div class="btn-toolbar bg-light" role="toolbar" aria-label="">
                              <div class="btn-group" role="group">
                                  <button id="add_btn" class="navbar-brand btn-outline-info" type="submit" data-tooltip="tooltip" data-placement="top" title="New subscription">
                                      <i class="fas fa-plus-circle fa-2x"></i>
                                  </button>
                              </div>
                              <div class="btn-group mr-2" role="group" aria-label="">
                                  <button id="activate_btn" class="navbar-brand btn-outline-primary" type="submit" data-tooltip="tooltip" data-placement="top" title="Activate subscriptions">
                                      <i class="far fa-play-circle fa-2x"></i>
                                  </button>
                                  <button id="deactivate_btn" class="navbar-brand btn-outline-warning" type="submit" data-tooltip="tooltip" data-placement="top" title="Deactivate subscriptions">
                                      <i class="far fa-pause-circle fa-2x"></i>
                                  </button>
                              </div>
                              <div class="btn-group" role="group">
                                  <button id="remove_btn" class="navbar-brand btn-outline-danger" type="submit" data-tooltip="tooltip" data-placement="top" title="Remove subscriptions">
                                      <i class="far fa-trash-alt fa-2x"></i>
                                  </button>
                              </div>
  
negative.code:         } //end of updateSubscriptions
  
          $('#btn_addrss').click(function (event) {
              var newRssField = $('#new_rss');
              var rss = newRssField.val();
              newRssField.popover(
                  {
  