how to map web application hosted on Jboss server with virtu

[rsrawat]

I hav a web application hosted on my Jboss -tomcat server. At present I am accessing it using:
http://extranet.delhicall.com:8080/shift/index.jsp
But I want to access it using this url:
http://extranet.delhicall.com/shift/index.jsp
can anyone who hav done this before , will tell me.
Thanx in Advance