I am developing a web based application using status2 & Jsp. Whenever the user input is given like an radio button option

1. Register New - N (passing Input value)
2. Search All - S(passing Input value)

on selection of any one i am submitting the form to redirect the related pages. While a user submitting the form all the user input i want to verify in server side (Action class) the every input is supplied from user is not changed in between mid of the request and response. How can i achieve this.