Reacting to radio button selection

HI,

I am sorry for replying to a very old Thead but I could not locate any place that will answer my question. My question lays very closer to this. I am also doing a online form which is a feed back. Based on the radio buttons in the top of the page, I need to render rest of the form elements

eg:

Code:

<form:radiobuttons path="categoryCode" items="${questionCategories}" itemValue="form_category_code" itemLabel="form_category" /> </span>

Then the sub categories of the form will be listed below that based on the selection above

Code:

<form:radiobuttons path="subCategory" items="${subCategories}" itemValue="form_sub_category_code" itemLabel="form_sub_category" />

and again based on the sub category selection, I need to do more changes (sometimes a drop down etc.. and finally the question list)

I need to bind these values also for a Module Attribute and my form is something like this

Code:

<form:form action="${actionUrl}" method="POST" modelAttribute="CustomerFeedback" enctype="multipart/form-data" name="CustomerFeedbackFormSingleton">

Anyone who can help??? I was struggling for this for a week and still no progress. I tried with

Code:

AutoPopulatingList

and

Code:

Lazy List

but later realized it does not cater my requirement.

Appreciates your help

/Upeksha