// when the DOM is ready...
$(document).ready(function () {

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


  // if false, we'll float all the panels left and fix the width 
  // of the container
  var 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
      });
      
      if($panels[0] != undefined && $panels[0] != null) {
        // 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('<img class="scrollButtons left" src="http://www.condition-critical.org/wp-content/themes/condition-critical/images/arrow-left.gif" />')
      .after('<img class="scrollButtons right" src="http://www.condition-critical.org/wp-content/themes/condition-critical/images/arrow-right.gif" />');

  // 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: 'img.left', 
      next: 'img.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);

});