// Thanks http://jqueryfordesigners.com/coda-slider-effect/
(function(){
 $.slider = 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);
 }
})(jQuery);