Apache + JK + Tomcat: Redirecting specific URL to a servlet

Hi, everybody!
I'm searching for a solution to my question for some time, but didn't find anything clear enough.
So, my situation is:
I have Apache 2.2 and Tomcat installed on my server. Apache is using JK Connector to send request to Tomcat.
What do I need:
I have a servlet that could be accessed through "http://mydomain.com/site/*". I can access, through this servlet, any of the site's sections. Like http://mydomain.com/site/news, http://mydomain.com/site/movies or http://mydomain.com/site/tech.
I need to figure out a way of pointing one URL to each of these sections, but without changing the user URL. In other words, I have the domains www.mynews.com, www.mymovies.com and www.mytech.com, and would like that each one of these domains redirect to their respective servlet.
So, is there a way of accomplish this task?
Thank you,
CaioToOn!

Hi!
I'm already mapping the final part of the URL. eg: "news", "tech".
What I need is a way of mapping a domain to a sub-url, but avoiding changes on the user's browser url.
I'm searching for a few days on the Tomcat manual, Apache manual and forums, but nothing like what I need 'til now. I'm still searching, but if someone there already know, I'll be very happy! I got kind of urgency.
Thank you, again!
CaioToOn!

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