This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma 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.