How can I change default 8080 port to 80

[Satish Kumar]

Greetings,

I have installed Tomcat 4.1.12 and Apache 2.  Tomcat is listening on port 8080 whereas 
apache is listening on port 80.  What do I need to do so that tomcat listens to 
default http port 80?

Thanks,
Satish (A Beginner)