Auto-slide Twenty Eleven Featured Posts Slider v3.1

/*<script type="text/javascript" charset="utf-8">*/
/* * *
 * Auto-slide the Twenty Eleven Featured Posts Slider v3.1
 * with pause on mouse hover over featured content and
 * slide precursor button blinking.
 * By RavanH -- http://4visions.nl/?p=1001 --
 * Special thanks to Tim Down's setTimeout wrapper script
 * http://stackoverflow.com/a/3969760/573224
 *
 * 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. Change slide_precursor_time/speed to control
 * blinking of the upcoming slide dot (button).
 * Read the instructions next to the available options.
 */
(function($) {
  /* change these settings to your liking */
  var slide_delay = 5000; /* timeouts in ms */
  var slide_delay_first = 6000; /* first timeout in ms */
  var slide_effect = 'slide'; /* available options are 'slide', 'fade' or '' (default) */
  var slide_easing = 'swing'; /* available options are  'linear' or 'swing' */
  var slide_speed = 300; /* slide effect speed in ms */
  var slide_precursor_time = 1250 ; /* precursor blinking time in ms (0 is OFF) */
  var slide_precursor_speed = 300; /* precursor blink speed in ms */

  /* do not edit below here, unless you know what you're doing */
  var slide_precursor_timer = new Timer(function(){slide_preCursor($('nav.feature-slider a.active').parent().next().children().first());},slide_delay_first-slide_precursor_time);
  var slide_timer = new Timer(function(){slide_goOut($('section.featured-post').filter(':visible'),$('nav.feature-slider a.active').parent().next().children().first());},slide_delay_first);

  $('section.featured-post').hover(function(){slide_precursor_timer.pause();slide_timer.pause();},function(){slide_precursor_timer.resume();slide_timer.resume();}).slice(1).css('display','none');

  $('.feature-slider a').click(function() {
    slide_precursor_timer.clear();
    slide_timer.clear();
    var obj = $(this.hash);
    obj.css('opacity',1);
    var next_link = $(this).parent().next().children().first();
    if (next_link.length == 0) {
      next_link = $('nav.feature-slider a').first();
    }
    if (slide_effect == 'slide') {
      obj.slideDown(slide_speed, slide_easing, function(){slide_precursor_timer.clear();slide_precursor_timer = new Timer(function(){slide_preCursor(next_link);},slide_delay-slide_precursor_time);slide_timer = new Timer(function(){slide_goOut(obj,next_link);},slide_delay);} );
    } else if (slide_effect == 'fade') {
       obj.fadeIn(slide_speed, slide_easing, function(){slide_precursor_timer.clear();slide_precursor_timer = new Timer(function(){slide_preCursor(next_link);},slide_delay-slide_precursor_time);slide_timer = new Timer(function(){slide_goOut(obj,next_link);},slide_delay);} );
    } else {
      obj.show(slide_speed, slide_easing, function(){slide_precursor_timer.clear();slide_precursor_timer = new Timer(function(){slide_preCursor(next_link);},slide_delay-slide_precursor_time);slide_timer = new Timer(function(){slide_goOut(obj,next_link);},slide_delay);} );
    }
  });

  function slide_goOut(obj,link) {
    slide_precursor_timer.clear();
    if (link.length !== 0) {
      if (slide_effect == 'slide') {
        obj.slideUp(slide_speed, slide_easing, function(){link.trigger('click');});
      } else if (slide_effect == 'fade') {
        obj.fadeOut(slide_speed, slide_easing, function(){link.trigger('click');});
      } else {
        obj.hide(slide_speed, slide_easing, function(){link.trigger('click');});
      }
    }
  }

  function slide_preCursor(link) {
    slide_precursor_timer.clear();
    slide_precursor_timer = new Timer(function(){slide_preCursor(link);},slide_precursor_speed);
    link.toggleClass('active');
  }

  function Timer(callback,delay) {
    var timerid, start, remaining = delay;
    this.clear = function() {
      window.clearTimeout(timerid);
   }
    this.pause = function() {
      this.clear();
      remaining -= new Date() - start;
    };
    this.resume = function() {
      this.clear(); /* make sure we are not resuming without having cleared */
      start = new Date();
      timerid = window.setTimeout(callback, remaining);
    };
    this.resume();
  }
})(jQuery);
/*</script>*/