function noclic(clic)
{
var mess="Clic droit desactive"; //Vous pouvez changer ce message
if (navigator.appName == 'Netscape' && clic.which==3) {
alert(mess);
}

else
if (navigator.appName == 'Microsoft Internet Explorer' && event.button==2) {
alert(mess);
}}

if (document.layers) {
document.captureEvents(Event.MOUSEDOWN);
}

document.onmousedown = noclic;