How to disable the mouse right click

<script language="JavaScript" type="text/javascript">
        //Message to display whenever right click on website
        document.onmousedown = disableclick;

        status = "Right click option is not allowed";

        function disableclick(e) {
            if (event.button == 2) {
                alert(status);
                return false;
            }
        }
   
    </script>