Better table formatting for AEC's Virtual Tally Room (with sort)

aec_table_sort.js

// ==UserScript==
// @name        Better table formatting for AEC's Virtual Tally Room
// @namespace   ?
// @description Makes the table easier to read and adds sort.
// @include     http://vtr.aec.gov.au/Default.htm
// @version     1
// @grant       none
// @require     http://code.jquery.com/jquery-1.11.0.min.js
// ==/UserScript==

// based on script by blha303 @ http://blha303.biz/c3Ri.user.js

function addGlobalStyle(css) {
    var head, style;
    head = document.getElementsByTagName('head')[0];
    if (!head) { return; }
    style = document.createElement('style');
    style.type = 'text/css';
    style.innerHTML = css;
    head.appendChild(style);
}

addGlobalStyle("tr:nth-child(even) { background-color: #ddd; }");
addGlobalStyle("tr:nth-child(odd) { background-color: #eee; }");

var $td = jQuery('table.results tbody tr.rownorm');

function addSort(col) {
  var $th = jQuery('table.results tbody tr th:nth-child(' + col + ')');
  $th.wrapInner('<a href="#' + $th.text() + '" />')
  $th.on('click', function() {
    jQuery('table.results tbody tr.rownorm').remove();
    var order = []
    $td.each(function(index, item) {
      order.push(item)
    })
    order.sort(function(a, b) {
      var a = parseFloat($(a).find('td:nth-child(' + col + ')').text().replace(/\,/g,""));
      var b = parseFloat($(b).find('td:nth-child(' + col + ')').text().replace(/\,/g,""));
      if (a < b) {
        return 1;
      }
      if (a > b) {
        return -1;
      }
      return 0;
    })
    jQuery('table.results tbody tr:nth-child(' + 1 + ')').after(order);
  })
}

addSort(2)
addSort(3)
addSort(4)