lorchess.ru/_assets/javascripts/custom.js

$(function() {
  /* Fix the position of chess board while scrolling */
  if (obj = $('#GameWrapper')) {
    obj.affix({
      offset: {
        top: function () {
          return obj.parent().offset().top;
        }
      }
    })
  };

  /* Sort a tournament table with tablesorter */
  $('.tablesorter').tablesorter({
    widgets: ['zebra']
  });
})

/* Stylize pgn4web elements by Bootstrap */
function customFunctionOnPgnGameLoad() {
  $('#GameSelSelect').addClass('form-control');
  $('#autoplayButton').click(refreshButtonset);
}
function customFunctionOnMove() {
  refreshButtonset();
}
function refreshButtonset() {
  $('#GameButtons input').addClass('btn btn-default');
}