Auto slide for Twenty Eleven Featured Posts Slider

/* * *
 * Auto-slide the Twenty Eleven Featured Posts Slider
 * by RavanH -- http://4visions.nl/?p=1001 --
 * Paste code in a text widget in the Showcase Sidebar.
 * Adapt variables 'slide_speed' and 'slide_delay' to change
 * the slider effect and timeout speed in milliseconds.
 * The variable 'slide_delay_first' is meant for the first
 * timeout during which page elements like images are still
 * loading which usually needs some extra time while
 * slide_effect and slide_easing control more advanced slider
 * behaviour. Read the instructions for available options.
 */
(function($) {
  var slide_delay_first = 6000; /* first timeout in ms */
  var slide_delay = 5000; /* timeouts in ms */
  var slide_speed = 300; /* effect speed in ms */
  var slide_effect = 'slide'; /* available options are 'slide', 'fade' or '' (default) */
  var slide_easing = 'swing'; /* available options are  'linear' or 'swing' (default) */

  var slide_timeout;
  $('section.featured-post').slice(1).css('display', 'none');
  slide_setTimeout(slide_delay_first, $('nav.feature-slider a.active').parent().next().children().first() );

  $('.feature-slider a').click(function() {
    window.clearTimeout(slide_timeout);
    if (slide_effect == 'fade') {
       $(this.hash).css({ display: 'none', opacity: 1, visibility: 'visible' }).fadeIn(slide_speed, slide_easing, slide_setTimeout(slide_delay, $(this).parent().next().children().first()) );
    } else if (slide_effect == 'slide') {
      $(this.hash).css({ display: 'none', opacity: 1, visibility: 'visible' }).slideDown(slide_speed, slide_easing, slide_setTimeout(slide_delay, $(this).parent().next().children().first()) );
    } else {
      $(this.hash).css({ display: 'none', opacity: 1, visibility: 'visible' }).show(slide_speed, slide_easing, slide_setTimeout(slide_delay, $(this).parent().next().children().first()) );
    }
  });

  function slide_setTimeout(delay, next_link) {
    if (next_link.length == 0) {
      next_link = $('nav.feature-slider a').first();
    }
    if (next_link.length !== 0) {
      if (slide_effect == 'fade') {
        slide_timeout = window.setTimeout(function(){$('section.featured-post').filter(':visible').fadeOut(slide_speed, slide_easing, function(){next_link.trigger('click');});}, delay);
      } else if (slide_effect == 'slide') {
        slide_timeout = window.setTimeout(function(){$('section.featured-post').filter(':visible').slideUp(slide_speed, slide_easing, function(){next_link.trigger('click');});}, delay);
      } else {
        slide_timeout = window.setTimeout(function(){$('section.featured-post').filter(':visible').hide(slide_speed, slide_easing, function(){next_link.trigger('click');});}, delay);
      }
    }
  }
})(jQuery);