code: function(){
      if(isWebkit) {
        var $test = $('<div>').css('width', 0).append(
          $('<table>').css('max-width', '100%').append(
            $('<tr>').append(
              $('<th>').append(
                $('<div>').css('min-width', 100).text('X')
              )
            )
          )
        );
        $("body").append($test);
        var ret = ($test.find("table").width() == 0);
        $test.remove();
        return ret;
      }
      return false;
    }
docs: safari 7 (and perhaps others) reports table width to be parent container's width if max-width is set on table. see: https://github.com/mkoryak/floatThead/issues/108