JavaScript Tutorial/Window/onresize
Window onresize event handler
<html>
<head>
<script language="JavaScript" type = "text/javascript">
<!--
window.onresize = DisplayMsg;
function DisplayMsg()
{
window.alert("You just resized the window.");
}
//-->
</script>
<title>Window Resizing</title>
</head>
<body>
</body>
</html>