Do you mean you want to redeploy your web app without making changes? If so, just update the war or ear file. On *nix, you can 'touch mywar.war' in <jboss-home>/server//deploy. JBoss will see that the modified attribute is newer and redeploy the app.
hmmm...unfortunately I'm on Windows XP
Isn't there a way to do this using the HTMLAdapter?
In Tomcat, there is a "manager?reload&context=/path", that reloads an application...something like this in JBoss?