You can search the string
internetexplorer.security.PrivilegeManager.disablePrivilege
in http://msdn.microsoft.com
There, you can get the official doc from MS

> -----Message d'origine-----
> De : Elildo Mancebo Reis [mailto:lists@a...]
> Envoy=C3=A9 : jeudi 19 d=C3=A9cembre 2002 16:41
> =C3=80 : javascript
> Objet : [javascript]
> internetexplorer.security.PrivilegeManager.disablePrivilege("U
> niversalBr
> owserWrite");
>
>
> I'd like to disable alert message when closing main window,
> and I understood
> it would help me, but it didn't, or it's my mistake.
>
> Would some of you help me?
>
> How do I use this?
>
> internetexplorer.security.PrivilegeManager.disablePrivilege("U
> niversalBrowse
> rWrite");
>
>
> Elildo Mancebo Reis - from Brazil
>