//script tags removed let lastScrollTop = 0; const header = document.getElementById("mainheader"); window.addEventListener("scroll", function () { const currentScroll = window.pageYOffset || document.documentElement.scrollTop; if (currentScroll > lastScrollTop) { // Scrolling down header.style.transform = "translateY(-100%)"; } else { // Scrolling up header.style.transform = "translateY(0)"; } lastScrollTop = currentScroll <= 0 ? 0 : currentScroll; });