(function ($) {

  $(function() {

    var $panels = $('#slider .scrollContainer > div'),
        $container = $('#slider .scrollContainer'),
        horizontal = true;

    // float the panels left if we're going horizontal
    if (horizontal) {
      $panels.css({
        'float' : 'left',
        'position' : 'relative' // IE fix to ensure overflow is hidden
      });

      // calculate a new width for the container (so it holds all panels)
      $container.css('width', $panels[0].offsetWidth * $panels.length);
    }


    // collect the scroll object, at the same time apply the hidden overflow
    // to remove the default scrollbars that will appear
    var $scroll = $('#slider .scroll').css('overflow', 'hidden');

    // apply our left + right buttons
    $scroll
      .before('<a class="scrollButtons left" href="#" >&larr;</a>')
      .after('<a class="scrollButtons right" href="#" >&rarr;</a>');

    // handle nav selection
    function selectNav() {
      $(this)
        .parents('ul:first')
          .find('a')
            .removeClass('selected')
          .end()
        .end()
        .addClass('selected');
    }

    $('#slider .navigation').find('a').click(selectNav);

    // go find the navigation link that has this target and select the nav
    function trigger(data) {
      var el = $('#slider .navigation').find('a[href$="' + data.id + '"]').get(0);
      selectNav.call(el);
    }

    if (window.location.hash) {
      trigger({ id : window.location.hash.substr(1) });
    } else {
      $('ul.navigation a:first').click();
    }

    // offset is used to move to *exactly* the right place, since I'm using
    // padding on my example, I need to subtract the amount of padding to
    // the offset.  Try removing this to get a good idea of the effect
    var offset = parseInt((horizontal ?
      $container.css('paddingTop') :
      $container.css('paddingLeft'))
      || 0) * -1;


    var scrollOptions = {
      target: $scroll, // the element that has the overflow

      // can be a selector which will be relative to the target
      items: $panels,

      navigation: '.navigation a',

      // selectors are NOT relative to document, i.e. make sure they're unique
      prev: 'a.left',
      next: 'a.right',

      // allow the scroll effect to run both directions
      axis: 'xy',

      onAfter: trigger, // our final callback

      offset: offset,

      // duration of the sliding effect
      duration: 500,

      // easing - can be used with the easing plugin:
      // http://gsgd.co.uk/sandbox/jquery/easing/
      easing: 'swing'
    };

    // apply serialScroll to the slider - we chose this plugin because it
    // supports// the indexed next and previous scroll along with hooking
    // in to our navigation.
    $('#slider').serialScroll(scrollOptions);

    // now apply localScroll to hook any other arbitrary links to trigger
    // the effect
    $.localScroll(scrollOptions);

    // finally, if the URL has a hash, move the slider in to position,
    // setting the duration to 1 because I don't want it to scroll in the
    // very first page load.  We don't always need this, but it ensures
    // the positioning is absolutely spot on when the pages loads.
    scrollOptions.duration = 1;
    $.localScroll.hash(scrollOptions);


  });

}(jQuery));