示例
<html>
<body>
<script>
$("a").click(function() {
$("html, body").animate({ scrollTop: 0 }, "slow");
return false;
});
</script>
<h3>TOP OF PAGE</h3>
<br>
This is demo text.<br>
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This is demo text.<br>
This is demo text.<br>
This is demo text.<br>
This is demo text.<br>
This is demo text.<br>
This is demo text.<br>
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This is demo text.<br>
This is demo text.<br>
This is demo text.<br>
This is demo text.<br>
This is demo text.<br>
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This is demo text.<br>
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This is demo text.<br>
This is demo text.<br>
This is demo text.<br>
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This is demo text.<br>
This is demo text.<br>
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<br>
<h3>BOTTOM OF PAGE</h3>
<a href="#">Scroll up</a>
</body>
</html>
