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- var nav = document.getElementById('nav'),
- inner = document.getElementById('inner'),
- height = inner.innerHeight,
- scroll,
- lastScroll = 0;
- function navCheck() {
- scroll = inner.scrollTop;
- if (scroll >= lastScroll) {
- nav.className = 'fixed slide-up';
- } else {
- nav.className = 'fixed slide-down';
- }
- lastScroll = scroll;
- }
- inner.onscroll = navCheck;
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