View source for Team:CIEI-BJ/js/nav/slow fix


	<script type="text/javascript">
        //缓动隐藏功能实现
        var new_scroll_position = 0;
        var last_scroll_position;
        var header = document.getElementById("header");

        window.addEventListener('scroll', function(e) {
            last_scroll_position = window.scrollY;

            // Scrolling down
            if (new_scroll_position < last_scroll_position && last_scroll_position > 80) {
                // header.removeClass('slideDown').addClass('slideUp');
                header.classList.remove("slideDown");
                header.classList.add("slideUp");

                // Scrolling up
            } else if (new_scroll_position > last_scroll_position) {
                // header.removeClass('slideUp').addClass('slideDown');
                header.classList.remove("slideUp");
                header.classList.add("slideDown");
            }

            new_scroll_position = last_scroll_position;
        });
	</script>