This script will prevent users from right clicking on your page and will not present an alert message when you attempt it. Try clicking on this page. Original author unknown but modified by A1 to comply with IE4+, NS4+ and NS6 browsers.

<script language=JavaScript> function clickIE() { if (document.all) { return false; } } function clickNS(e) { if (document.layers||(document.getElementById&&!document.all)) { if (e.which==2||e.which==3) { return false; } } } if (document.layers) { document.captureEvents(Event.MOUSEDOWN); document.onmousedown=clickNS; } else{ document.onmouseup=clickNS; document.oncontextmenu=clickIE; } document.oncontextmenu=new Function("return false") </script>