// 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( $ ){
	var $prev = $('a.prev'),//prev button
		$next = $('a.next');//next button
  
  $prev.hide(); // na zacatku skryjme prev button
  	
	$('#nahledy').serialScroll({
		items:'li',
		prev:'#vagony a.prev',
		next:'#vagony a.next',
		offset:-580, //when scrolling to photo, stop 580 before reaching it (from the left)
		start:2, //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 ){ // skryvani buttonu, pokud se blizime ke konci
			$prev.add($next).fadeIn("slow");
			if( pos == 2 )
				$prev.hide();
			else if( pos == $items.length-1 )
				$next.fadeOut("slow");
		}		
	});
});