just sorting

tablesorter.js

var tablesorter = function(table) {
  var data = [],
      header = {},
      header_tr,
      $table = $(table),
      is_asc = false,
      $indicator = $('<span></span>');

  $table.find('th').each(function(i, th) {
    var $th = $(th);
    header[i] = $th.text().trim();
    header_tr = th.parentNode;
    $th.attr('myindex', i); // data will be destroyed after modification
    // console.log(i + ': ' + header[i]);
  });

  $table.find('tr').each(function (i, tr) {
    if (tr === header_tr) {
      return;
    }
    var obj = {};
    $(tr).find('td').each(function (_i, td) {
      obj[_i] = $(td).text().trim();
      obj.tr = td.parentNode;
    });
    data.push(obj);
  });

  $table.on('click', 'th', function (ev) {
    var $th = $(ev.currentTarget);
    var idx = $th.attr('myindex');
    // console.log('sorting: ' + data.length + ' by ' + header[idx] + '(' + idx + ')');

    if ($indicator[0].parentNode === $th[0]) {
      is_asc = !is_asc;
    } else {
      is_asc = false;
      $th.append($indicator);
    }

    if (is_asc) {
      $indicator.text('↑');
    } else {
      $indicator.text('↓');
    }

    data.sort(function (a, b) {
      var a_val = a[idx];
      var b_val = b[idx];
      var a_num_val = parseFloat(a_val);
      var b_num_val = parseFloat(b_val);
      if (!isNaN(a_num_val) && !isNaN(b_num_val)) {
        if (a_num_val === b_num_val) {
          return 0;
        }
        else if (a_num_val < b_num_val) {
          return is_asc ? -1 : 1;
        }
        else {
          return is_asc ? 1 : -1;
        }
      }
      else {
        if (a_val < b_val) {
          return is_asc ? -1 : 1;
        } else if (a_val > b_val) {
          return is_asc ? 1 : -1;
        }
        else {
          return 0;
        }
      }
    });

    $table.empty();
    $table.append(header_tr);
    data.forEach(function (obj) {
      $table.append(obj.tr);
    });
  });
};