<html>
<head>
<title>OnScroll Example</title>
<script type="text/javascript">
window.onscroll = function () {
alert("scrolling");
}
</script>
</head>
<body>
<P>Try scrolling this window.</p>
<P>Try scrolling this window.</p>
<P>Try scrolling this window.</p>
<P>Try scrolling this window.</p>
<P>Try scrolling this window.</p>
<P>Try scrolling this window.</p>
<P>Try scrolling this window.</p>
<P>Try scrolling this window.</p>
<P>Try scrolling this window.</p>
<P>Try scrolling this window.</p>
<P>Try scrolling this window.</p>
<P>Try scrolling this window.</p>
<P>Try scrolling this window.</p>
<P>Try scrolling this window.</p>
<P>Try scrolling this window.</p>
<P>Try scrolling this window.</p>
<P>Try scrolling this window.</p>
<P>Try scrolling this window.</p>
<P>Try scrolling this window.</p>
<P>Try scrolling this window.</p>
<P>Try scrolling this window.</p>
</body>
</html>
19.11.onscroll
19.11.1.
Use window.onscroll to add the onscroll event handler