a4j:commandButton and attribute data using JSON

[murilobr]

People,

I'm with the following problem:

<h:form>
  <h:commandButton action="#{bean.myAction}" data="#{bean.myValue}" oncomplete="alert(data.erro)">
</h:form>

I would like to know is: How can I serialize bean.myValue?
I try it like String with this syntax:

myValue = "{\"erro\": \"true\" }"

I try to use a JSONObject:

JSONObject aux = new JSONObject();
aux.put("erro", "true");
myValue = aux.toString();

But none of them works, always return undefined on js alert!!

Someone please????

[murilobr]

I found the answer:

http://labs.jboss.com/community/wiki/RichFacesCookbookJsFunctionJson.pdf