function right(e) {
if (navigator.appName == 'Netscape' && (e.which == 2 || e.which == 3)) {
alert("error");
return false;
}
else if (navigator.appName == 'Microsoft Internet Explorer' &&
(event.button==2
|| event.button == 3)) {
alert("error");
return false;
}
return true;
}
document.onmousedown=right;
if (document.layers) window.captureEvents(Event.MOUSEDOWN);
window.onmousedown=right;