Cacher is the code snippet organizer for pro developers

  Drupal.behaviors.spaintSilkModal = {
    attach: function (context, settings) {
      // Declare constants for right and left arrow keys.
      var RIGHT_ARROW = 39;
      var LEFT_ARROW = 37;

        $(document).keydown(function (event) {
        if (event.which == RIGHT_ARROW && !$('.ico-next-track').hasClass('keydown')) {
          $('.ico-next-track').addClass('keydown').click();
        }
        if (event.which == LEFT_ARROW && !$('.ico-previous-track').hasClass('keydown')) {
          $('.ico-previous-track').addClass('keydown').click();
        }
      });
    }
  }