JSF and AJAX : use case sample

gistfile1.xml

<h:body>

        <h:form id="mainform">
                    <h:commandButton
                        id="cmd"
                        action="#{ajaxCounterBean.execute}"
                        value="Ajax"
                        immediate="true">

                    </h:commandButton>
                    <h:panelGroup id="output">
                            <input id="counter" value="#{ajaxCounterBean.count}"/>
                    </h:panelGroup>
        </h:form>

        <h:panelGroup id="output2">
                    <input value="#{ajaxCounterBean.count}"/>
        </h:panelGroup>

        <h:form id="secondform"  prependId="false">
                    <h:panelGroup >
                            <h:panelGroup id="output3">
                                <input value="#{ajaxCounterBean.count}"/>
                            </h:panelGroup>
                    </h:panelGroup>
        </h:form>

    </h:body>