// 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
	});
	
	// 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="images/scroll_left.png" />')
	.after('<img class="scrollButtons right" src="images/scroll_right.png" />');

// 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);

});