struts2: howto ajax-validate with annotation?

[Peter Primrose]

does anyone have an example of ajax-validation with annotation?

I'm trying to achieve the following: I have a form with:

1. Name
2. DOB
3. e-mail

[Update Button]

Name/e-mail are mandatory fields. Right now, if the user clicks Update and everything goes well - a Success Message is shown in the target ID.

If the user doesn't provide the Name - An error message is shown: "Update Fail"

Problem is that in my output, in case of a failure, there is no indication of the required field (what is the problem).

So my question is this: how can I tell which of the fields is missing?

* I'm using annotation in my form

  
configuration:
 
<result name="input">/pages/registration/error.jsp</result>
<result name="confirm-ajax">/pages/registration/confirm.jsp</result>
 

error.jsp
<%@ taglib prefix="s" uri="/struts-tags" %>
 
<%
    request.setAttribute("decorator", "none");
    response.setHeader("Cache-Control","no-cache"); //HTTP 1.1
    response.setHeader("Pragma","no-cache"); //HTTP 1.0
    response.setDateHeader ("Expires", 0); //prevents caching at the proxy server
 
Update Fail!
%>