> I want to disable JavaScript completely. AFAIK, support 
for 
> JavaScript is sent in the HTTP request header and I would 

No - a non-reliable way the server can guess that the 
client is using javascripting or not is to test the user-
agent (you can change it in set options / browser id). But 
this isn't reliable: you can have a javascript aware 
browser with javascript support disabled, for example for 
security reasons (remember the various js bugs on Internet 
Explorer?)
The other solution is to redirect/reload to a javascript-
website-zone inside a regular html file, using javascript.
But this will not be changed using an offline browser : 
you'll have to disable the scripting feature in your 
browser anyway.