// 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;

    // 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');

    function selectNav() {
      var cssClass;
      // Make all buttons inactive
      $("ul.sn_offerings 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);
    }

    $("ul.sn_offerings").find("a").click(selectNav);

    // go find the navigation link that has this target and select the nav
    function trigger(data) {
        var el = $("ul.sn_offerings").find('a[href$="' + data.id + '"]').get(0);
        // Display the corresponding right column
        select_rightcol(data);
        // Change the tab
        selectNav.call(el);
    }

    if (window.location.hash) {
        trigger({ id : window.location.hash.substr(1) });
    } else {
        $("ul.sn_offerings").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: 'ul.sn_offerings',

        // 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',

        //onBefore: hide_rightcol, // fade out the right column when a menu change is made
        onAfter: trigger, // our final callback
        //onAfterFirst: select_rightcol, // fade in the selected right column

        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);

});