// Easing equation, borrowed from jQuery easing plugin
// http://gsgd.co.uk/sandbox/jquery/easing/
jQuery.easing.easeOutQuart = function (x, t, b, c, d) {
	return -c * ((t=t/d-1)*t*t*t - 1) + b;
};

jQuery(function( $ ){
	/**
	 * Most jQuery.serialScroll's settings, actually belong to jQuery.ScrollTo, check it's demo for an example of each option.
	 * @see http://flesler.demos.com/jquery/scrollTo/
	 * You can use EVERY single setting of jQuery.ScrollTo, in the settings hash you send to jQuery.serialScroll.
	 */
	
	/**
	 * The plugin binds 6 events to the container to allow external manipulation.
	 * prev, next, goto, start, stop and notify
	 * You use them like this: $(your_container).trigger('next'), $(your_container).trigger('goto', [5]) (0-based index).
	 * If for some odd reason, the element already has any of these events bound, trigger it with the namespace.
	 */		
	
	/**
	 * IMPORTANT: this call to the plugin specifies ALL the settings (plus some of jQuery.ScrollTo)
	 * This is done so you can see them. You DON'T need to specify the commented ones.
	 * A 'target' is specified, that means that #screen is the context for target, prev, next and navigation.
	 */
	
	var $prev = $('#prevBT'),//prev button
		$next = $('#nextBT');//next button
		
	$('#eventWrap').serialScroll({
		items:'li',
		prev:'#scrollBack a.prev',
		next:'#scrollForward a.next',
		offset:0, //when scrolling to photo, stop 230 before reaching it (from the left)
		start:0, //as we are centering it, start at the 2nd
		duration:1200,
		force:true,
		stop:true,
		lock:false,
		cycle:false, //don't pull back once you reach the end
		easing:'easeOutQuart', //use this easing equation for a funny effect
		jump: false, //click on the images to scroll to them
		
		onBefore:function( e, elem, $pane, $items, pos ){
			$prev.add($next).show();
			if( pos == 0 )
				$prev.hide();
			else if( pos == $items.length-1 )
				$next.hide();
		}
		
	});

});