Any way to give individual message headers specific styles?

[David Gibbs <david@xxxxxxxxxxxx>]

Does anyone know if there is a way I can setup my MRC file to give 
individual mail headers specific styles?

I've had requests to suppress some of the information on the archives so 
it doesn't show up by default.  Specifically, they want the Subject, 
From, and Date to show up all the time, but the List-* headers only to 
show up on request (when they click on a icon).

Subject:
From:
Date:
List-archive:
List-help:
List-id:
List-post:
List-subscribe:
List-unsubscribe:

I can do this with a little bit of javascript and styles.  It works fine 
on my prototype.

The problem is: I don't know how I can attach a 'hidden' style to the 
List-* headers.

I had hoped the FIELDSTYLES or LABELSTYLES might be of use, but it 
appears they aren't.

Any suggestions?

Thanks!

david