The code used to make this work is shown below (Cut and Paste between the HEAD tags of your web page):
<script LANGUAGE="JavaScript">
<!--
function click() {
if (event.button==2) {
alert('You Can NOT use the Right Mouse Button on this Page, Sorry!');
}
}
document.onmousedown=click
// -->
</script>
(If you change the 'event.button' value to 1 you can stop the left mouse button working!):