if (document.layers){
window.captureEvents(Event.MOUSEDOWN | Event.MOUSEUP)
window.onmousedown=rightclick;
window.onmouseup=rightclick;

function rightclick(e) {
if (e.which == 3) {
// Put right mouse code here
alert('NO.');
return false;
}
else {
return true;
}
}
}

if (document.all){
function click() {
if (event.button==2) {
alert('NO.')
}

if (event.button==3) {
alert('NO.')}
}
document.onmousedown=click
}