使 WillPaginate 支持用左右键翻页

will_paginate_left_right_arrrow

// From Dribbble.com
// Keyboard shortcuts for browsing pages of lists
// 使 WillPaginate 支持用左右键翻页
(function($) { 
  $(document).keydown(handleKey);
  function handleKey(e){
      var left_arrow = 37;
      var right_arrow = 39;

      if (e.target.localName == 'body' || e.target.localName == 'html') {
          if (!e.ctrlKey && !e.altKey && !e.shiftKey && !e.metaKey) {
              var code = e.which;
        if (code == left_arrow)
                  prevPage();
        else if (code == right_arrow)
                  nextPage();
          }
      }
  }

  function prevPage(){
      var href = $('.pagination .prev_page').attr('href');
      if (href && href != document.location)
          document.location = href;
  }

  function nextPage(){
      var href = $('.pagination .next_page').attr('href');
      if (href && href != document.location)
          document.location = href;
  }
})(jQuery);