DDMMYY date parser for TableSorter jQuery plugin

gistfile1.js

      // DDMMYY date parser for TableSorter plugin
      //  'cause stock "shortDate" sorter only works with 'yyyy' year format
      //  ref: http://tablesorter.com/docs/example-parsers.html
      var regx = /(\d{2})\/(\d{2})\/(\d{2})/;
      var match_dd_mm_yy;
      $.tablesorter.addParser({
        id: "ddmmyy",
        is: function(s) {
          return false;
        },
        format: function(s) {
          match_dd_mm_yy = regx.exec(s);
          // consider XX or XI century dates
          return (match_dd_mm_yy[3]>="90" ? "19" : "20") + match_dd_mm_yy[3] + match_dd_mm_yy[2] + match_dd_mm_yy[1];
        },
        type: "numeric"
      });

      $(".domains").tablesorter({
        headers: {
          1: { sorter: "ddmmyy" },
          2: { sorter: "ddmmyy" }
        },
        sortList: [[3,0]]
      });