function noclic(clic) {
var mess="Copyright © Cargo 54"; //changer le 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;