sS hjs_redirectRandomKeystrokesToAutofocusField() {
  ret hjs([[
    $(document).on('keydown', function(e) {
      var nodeName = e.target.nodeName;
      if ( 'INPUT' == nodeName || 'TEXTAREA' == nodeName ) return;
      var key = event.which;
      if (key == 33 || key == 34) return; // pg up/dn
      $('[autofocus]').val('').trigger('focus');
    });
  ]]);
}