There's the
navigator.onLine
boolean property for IE4+.

> -----Message d'origine-----
> De : Earl Robb [mailto:erobb@b...]
> Envoy=C3=A9 : jeudi 9 janvier 2003 16:42
> =C3=80 : javascript
> Objet : [javascript] Detect if browser is in Offline mode
>
>
> Is there a way to check to see if a browser is set to work in
> offline mode?
>
> Thanks,
> Earl