htaccess and indexes

Hi,

Sorry if this question seems pretty basic, but I've just spent over 
an hour searching on the web, including on the main Apache sites, and 
I just can't seem to find the answer.

I need to know what directive to put in my .htaccess file to prevent 
users seeing the contents of a directory when that directory doesn't 
contain an index file.

For example, if a user tries to access the following address:

http://www.presse-en-ligne.com/site/

I'd like him to be rerouted to the error page, rather than seeing the 
contents of the "site/" directory.

NB: The site is running on Apache/1.3.19.

Many thanks for any help.
-- 
David Sharp, journalist(e), France <mailto:david.sharp(at)sharp-words.com>
Site personnel / Personal home page http://www.sharp-words.com/
Site et forum  / Press site & mailing list: http://www.presse-en-ligne.com/

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