[racket] disabling scribble/manual HTML navigation bars

When using "scribble/manual" to produce one-page HTML documentation for 
a PLaneT package... is there an option to prevent the navigation bars 
(i.e., the gray "...search manuals...", "top", "prev", etc. things) from 
being added?

(Reason for asking: I like to use this HTML for the home page of the 
package on my personal Web site, but the navigation bar doesn't do 
anything there.  I can just write a little script to modify the HTML 
after the fact; just checking whether there's a better way.)

-- 
http://www.neilvandyke.org/