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                <header class="nav-down">
    This is your menu.
    This is your body.
    This is your footer.


                body {
    padding-top: 40px;

header {
    background: #f5b335;
    height: 40px;
    position: fixed;
    top: 0;
    transition: top 0.2s ease-in-out;
    width: 100%;

.nav-up {
    top: -40px;

main {
   ) repeat;
    height: 2000px;

footer { background: #ddd;}
* { color: transparent}


                // Hide Header on on scroll down
var didScroll;
var lastScrollTop = 0;
var delta = 5;
var navbarHeight = $('header').outerHeight();

    didScroll = true;

setInterval(function() {
    if (didScroll) {
        didScroll = false;
}, 250);

function hasScrolled() {
    var st = $(this).scrollTop();
    // Make sure they scroll more than delta
    if(Math.abs(lastScrollTop - st) <= delta)
    // If they scrolled down and are past the navbar, add class .nav-up.
    // This is necessary so you never see what is "behind" the navbar.
    if (st > lastScrollTop && st > navbarHeight){
        // Scroll Down
    } else {
        // Scroll Up
        if(st + $(window).height() < $(document).height()) {
    lastScrollTop = st;