在线运行代码 - 菜鸟教程

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(cainiaoplay.com)</title>
<style>div {
    border: 1px solid black;
    width: 200px;
    height: 100px;
    overflow: scroll;
}
</style>
</head>
<body>

<p>尝试滚动 div。</p>
<div onscroll="myFunction()">In my younger and more vulnerable years my father gave me some advice that I've been turning over in my mind ever since.
<br><br>
'Whenever you feel like criticizing anyone,' he told me, just remember that all the people in this world haven't had the advantages that you've had.'</div>
<p>滚动 <span id="demo">0</span> 次。</p>
<script>
x = 0;
function myFunction() {
    document.getElementById("demo").innerHTML = x += 1;
}
</script>

</body>
</html>
源代码

动行结果
