Richfaces: submit when enter key pressed

<a4j:form>
  <h:inputText id="quick_search_client_id" value="#{searchCont.clientId}"/>

  <a4j:commandButton type="submit" value="Search"
        action="#{searchCont.search}" id="searchButton"/>
...
</a4j:form>

<rich:hotKey key="return"
    handler="#{rich:element('searchButton')}.click()"
    selector="#quick_search_client_id"/>