What is the best way, Seam, RichFaces, A4J.. to apply an error class to an H:input box when it returns an error?

<h:inputText styleClass="required" name="#{prefix}_lastName" id="#{prefix}_lastName"
          size="25" maxlength="50" value="#{address.lastName}" errorStyle="border: 1px solid red;" />
           <h:message
          id="#{prefix}_lastNameMsg" for="#{prefix}_lastName"
          styleClass="errors" />