Show Alert Message before Leaving Page

In this tutorial we will learn how to Show Alert Message before Leaving Page.We will use jQuery for this.

Code:

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Show Alert Message before Leaving Page</title>
<style type="text/css">
body
 {
 width: 980px;
 margin: 0px auto;
 text-align: center;
 padding-top: 50px;
 font-size: 20px;
 }
</style>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.8.2.js"></script>
<script type="text/javascript">
$(function() {
$(window).on('beforeunload', function() {
return '';
});
});
</script>
</head>
<body>
<form id="form1">
<div>
<b>Welcome to hightechnology.in</b>
</div>
</form>
</body>
</html>