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

    var $panels = $('#slider .scrollContainer > div');
    
    if ($panels.length > 0) {
    	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');
    	
    	
    	
    	// handle nav selection
    	function selectNav() {
    	    $(this)
    	        .parents('ul:first')
    	            .find('li')
    	                .removeClass('selected')
    	            .end()
    	        .end()
    	        .addClass('selected');
    	}
    	
    	$('#slider .navigation').find('li').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 + '"]').parent().get(0);
    	    selectNav.call(el);
			$('#slider .scroll').height($('#'+data.id).height());
    	}
    	
    	if (window.location.hash) {
    	    trigger({ id : window.location.hash.substr(1) });
    	} else {
    	    $('ul.navigation li: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);
    	
		$('#slider .scroll').height($('.scrollContainer div:first').height());
	}

});