Disable right click on images using jquery

<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>jQuery disable right click on webpage using asp.net</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js">
</script>
<script type="text/javascript" language="javascript">
$(function() {
$('img').bind("contextmenu", function() {
return false
 
});
});
</script>
</head>
<body>
<form id="form1" runat="server">
<img src="omsai.png" alt="om sai" />
<div>

</div>
</form>
</body>
</html>