How to disable right click on asp.net web page using JavaScript | Disable mouse right click on webpage

[script language="JavaScript" type="text/javascript"]
//Message to display whenever right click on website
var message = "Sorry, Right Click have been disabled.";
function click(e) {
if (document.all) {
if (event.button == 2 || event.button == 3) {
alert(message);
return false;
}
}
else {
if (e.button == 2 || e.button == 3) {
e.preventDefault();
e.stopPropagation();
alert(message);
return false;
}
}
}
if (document.all) {
document.onmousedown = click;
}
else {
document.onclick = click;
}
[/script]
[/head]
[body]
[form id="form1" runat="server"]
[div]
[/div]
[/form]
[/body]
[/html]