<script language=Javascript>
function right(e) {
if (navigator.appName == 'Netscape' && (e.which == 3 || e.which == 2)){
alert("ACA TU MENSAJE DE ALERTA.");
return false;
}
else if (navigator.appName == 'Microsoft Internet Explorer' &&
(event.button == 2 || event.button == 3)) {
alert("ACA TU MENSAJE DE ALERTA.");
return false;
}
return true;
}
document.onmousedown=right;
if (document.layers) window.captureEvents(Event.MOUSEDOWN);
window.onmousedown=right;
</script>