How can I redirect my domain to show 'www' in front of it. For example when someone type my domain name into a browser without the www, I want the domain to automatically default to the www, when it comes up ex. So when user enter mydomain.com I want him to be redirected directly to www.mydomain.com and automaticly to see www.mydomain.com n the addressbar insted od mydomain.com. I need this to be setup in a virtual host directive in my httpd.conf file

Thanks in advance