how to add www to my url?

HI all
i have a site http://mysite.com ,every catory url starts with http://mysite.com .i would like to change to http://www.mysite.com~~,please tell me how to change and where to configure.
thanks in advance!!
thanks

you can add a .htaccess file in you root directory,

add this code:

RewriteEngine On
RewriteCond %{HTTP_HOST} ^mysite.com$ [NC]
RewriteRule ^(.*)$ http://www.mysite.com/$1 [L,R=301]

:oops:

You could also add thw www. to the paths in includes/configure,php and admin/includes/congigure.php

stevesh:

You could also add thw www. to the paths in includes/configure,php and admin/includes/congigure.php

The configure files as noted above need to be updated to include the www in the path and a redirect such as posted below added for the main page to only work with www.

~Melanie

stevesh:

You could also add thw www. to the paths in includes/configure,php and admin/includes/congigure.php

Thanks for all, really appreciate all(mprough,stevesh,justdoitrocky) helps
it is working now.
thanks again