$(document).ready( function() {

	 $('.top').addClass('hidden');

	$.waypoints.settings.scrollThrottle = 50;
	$('#container').waypoint( function(event, direction) {
		$('.top').toggleClass('hidden', direction === "up");
	}, {
		offset: '500px'
	}).find('#main-nav-holder').waypoint( function(event, direction) {
		$(this).parent().toggleClass('sticky', direction === "down");
		event.stopPropagation();
	});
	// Register each section as a waypoint.
	$('#container > section').waypoint({
		offset: '10%'
	});

	// The same for all waypoints
	$('body').delegate('#container > section', 'waypoint.reached', function(event, direction) {

		var $active = $(this);

		if (direction === "up") {
			$active = $active.prev();
		}
		if (!$active.length)
			$active.end();

		$('.section-active').removeClass('section-active');
		$active.addClass('section-active');

		$('.link-active').removeClass('link-active');
		$('a[href=#'+$active.attr('id')+']').addClass('link-active');

	});
	// Negates the flash of non-active nav.
	$('body > #main-nav-holder a').click( function() {
		$(this).addClass('link-active');
	}).eq(0).addClass('link-active');
	// Wicked credit to
	// http://www.zachstronaut.com/posts/2009/01/18/jquery-smooth-scroll-bugs.html
	var scrollElement = 'html, body';
	$('html, body').each( function () {
		var initScrollTop = $(this).attr('scrollTop');
		$(this).attr('scrollTop', initScrollTop + 1);
		if ($(this).attr('scrollTop') == initScrollTop + 1) {
			scrollElement = this.nodeName.toLowerCase();
			$(this).attr('scrollTop', initScrollTop);
			return false;
		}
	});
	// Smooth scrolling for internal links
	$("a[href^='#']").click( function(event) {
		event.preventDefault();

		var $this = $(this),
		target = this.hash,
		$target = $(target);

		$(scrollElement).stop().animate({
			'scrollTop': $target.offset().top
			
		}, 1000, 'swing', function() {
			window.location.hash = target;
		});
	});
});