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

    var $panels = $('div.panel');
    var $container = $('#scroller');

    // 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 = $('#content').css('overflow', 'hidden');


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

    $('#links').find('a').click(selectNav);

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

    if (window.location.hash) {
        trigger({
            id: window.location.hash.substr(1)
        });
    } else {
        $('#links 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;

	// Get document size to determine whether or not to use hashes
	//$(document).height(); $(document).width();
	var dH = $(document).height();
	var dW = $(document).width();
	var wH = $(window).height();
	var wW = $(window).width();
	var doHash = !(dH > wH || dW > wW);
    var scrollOptions = {
        target: $scroll,
        // the element that has the overflow
        // can be a selector which will be relative to the target
        items: $panels,

        navigation: '#links a',

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

        hash: doHash,

        // 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.
    $('#scroll').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);

});