代码示例：（标识：event_onscroll_addeventlistener）
<!DOCTYPE html>
<html>
<head>
<style>
div {
border: 1px solid black;
width: 200px;
height: 100px;
overflow: scroll;
}
</style>
</head>
<body>
<p>本例使用 addEventListener() 方法将 "scroll" 事件附加到 div 元素。</p>
<p>请试试 div 中的滚动条</p>
<div id="myDIV">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 id="demo"></p>
<script>
document.getElementById("myDIV").addEventListener("scroll", myFunction);
function myFunction() {
document.getElementById("demo").innerHTML = "You scrolled in div.";
}
</script>
</body>
</html>
