How and Where to add JNDI for Hibernate?

I need the code to add JNDI name to achive connection pooling in hibernate. I have configured the connetion pooling in Jboss server with the JNDI name as "EmployeeDB"

How to configure it in hibernate.cfg.xml ??

Plez give me the code for hibernate.cfg.xml if i am using Hibernate 4 Final release.