Disable Right Click In a Web Page

We can disable right click on apage using the following code

  <script type="text/javascript">
        document.onmousedown = clickfn;

        function clickfn(e) {
            var button;
            if (navigator.appName == "Microsoft Internet Explorer") {
                button = event.button;
              
            }
            else {
                button = e.buttons;
            }

            if (button == 2) {
                alert("Right Click Disabled");

                if (navigator.appName == "Microsoft Internet Explorer") {
                    event.returnValue = false;
                }               
                return false;
            }
        }
    </script>


navigator.appName == "Microsoft Internet Explorer"  this is used because in ie 7 "e" is not supported so we used event in common for all ie versions...