client side validation with form submitting disabled and enabled

[kretes]

I appreciate the way hibernate validator + rich faces tag support reRender="" works, because it gives user fast feedback about correctness of data.

I wanted to disable form submitting when there exist validation errors, and user sees them, so i took this solution:


  <h:inputTextarea value="#{leaveHome.instance.requestorComment}" required="true">
   <a4j:support event="onblur" reRender="commentField,save" bypassUpdates="true" />
  </h:inputTextarea>

[..]

<h:commandButton id="save"
                          value="Save"
                         action="#{leaveHome.persist}"
                       rendered="#{!leaveHome.managed}"
                       disabled="#{!validation.succeeded}"/>

I tried also

           disabled="#{validation.failed}"/>

but the 'save' button, once disabled, never gets enabled again, after validation errors are fixed...

I want it to enable when user fixes input errors