/*
function noRight(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("本サイトでは右クリック操作はできません。");
return false;
}
return true;
}

document.onmousedown=noRight;
document.onmouseup=noRight;
if (document.layers) window.captureEvents(Event.MOUSEDOWN);
if (document.layers) window.captureEvents(Event.MOUSEUP);
window.onmousedown=noRight;
window.onmouseup=noRight;
*/