// Runs when the page is fully loaded
$(window).load(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;

    if($panels.length > 0)
    { 
        // 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
        $("ul.navigation")
            .before('<a class="scrollButtons sprite leftarrow" title="Scroll Left"></a>')
            .after('<a class="scrollButtons sprite rightarrow" title="Scroll Right"></a>');

        function selectNav() {
          var cssClass;
          // Make all buttons inactive
          $("ul.navigation a").each(function(){
            cssClass = $(this).attr("class");
            if( cssClass.indexOf('_active') != -1 ) {
              cssClass = cssClass.substr(0, cssClass.indexOf('_active') );
              $(this).attr("class", cssClass);
            }
          });
          // Make the button clicked active
          cssClass = $(this).attr("class") + "_active";
          $(this).attr("class", cssClass);
        } 

        $('#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);
            // Change the tab
            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

            //queue:true, // enable queuing
                  
            // 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.leftarrow',
            next: 'a.rightarrow',

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

            //onBefore: , // before the slide
            onAfter: trigger, // our final callback
            //onAfterFirst: , // our intermediate callback (requires queuing)

            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);
    }

});