This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
Sometime before displaying the JSP, either in the reset(...) method of the ActionForm or in an Action class that forwards to this JSP, just set the value of the radio property to "Continue". Struts will automatically cause the correct button to be selected based on the value of the ActionForm property.