function right(e) {
if (navigator.appName == 'Netscape' && (e.which == 3 || e.which == 2))
{
 return false;
}
else if (navigator.appName == 'Microsoft Internet Explorer' && (event.button 
== 2 || event.button == 3))
{
 alert("Permission denied");
 return false;
}
return true;
}

document.onmousedown=right;
document.onmouseup=right;
if (document.layers) window.captureEvents(Event.MOUSEDOWN);
if (document.layers) window.captureEvents(Event.MOUSEUP);
window.onmousedown=right;
window.onmouseup=right;

/*---------------End----------------*/