Disable Right Click on Web Page in ASP.NET

If you want to disable Right Click in your web pages, use this java script in  your web page. 
<script language="JavaScript"> var message = 'Right Click is disabled';
function clickIE() { if (event.button == 2) { alert(message); return false; } }
function clickNS(e) {
if (document.layers || (document.getElementById && !document.all)) {
if (e.which == 2 || e.which == 3) { alert(message); return false; }
}
}
if (document.layers) { document.captureEvents(Event.MOUSEDOWN); document.onmousedown = clickNS; }
else if (document.all && !document.getElementById) { document.onmousedown = clickIE; }
document.oncontextmenu = new Function('alert(message);return false') </script>