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

    var $panels = $('#slider .scrollContainer > div');
    var $container = $('#slider .scrollContainer');

	if($panels.length > 0){
	
		// 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);
	
	}

});