Ví dụ
Bản trình diễn trực tiếp
<html>
<body>
<script>
$("a").click(function() {
$("html, body").animate({ scrollTop: 0 }, "slow");
return false;
});
</script>
<h3>TOP OF PAGE</h3>
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<h3>BOTTOM OF PAGE</h3>
<a href="#">Scroll up</a>
</body>
</html>