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(function($) {
	var timer = null;
	var fps = 60;
	var frameTime = 1000 / fps;

	function setOffset() {
		clearTimeout(timer);

		var $container = $('#container');
		var classSet = 'blur';
		var windowOffset;

		timer = setTimeout(function() {
			windowOffset = $(window).scrollTop();

			if (windowOffset >= 72) {
				$container.addClass(classSet);
			} else {
				$container.removeClass(classSet);
			}
		}, frameTime);
	}

	$(window).scroll(function() {
		setOffset();
	});
})(jQuery);