<div id="settingsdiv" style="width:350px; height:400px; position:absolute;  background-color:r; top:20px; left:1px">
                    <h:panelGrid columns="2">
                        <h:panelGroup>User Session Timeout</h:panelGroup>
                        <h:panelGroup>
                            <h:selectOneMenu value="#{ApplicationController.session}">
                                <f:selectItem itemValue="one" itemLabel="Option one" />
                                <f:selectItem itemValue="two" itemLabel="Option two" />
                                <f:selectItem itemValue="three" itemLabel="Option three" />
                                <f:selectItem itemValue="custom" itemLabel="Define custom value" />
                                <f:ajax render="input" />
                            </h:selectOneMenu>
                            <h:panelGroup id="input">
                                <h:inputText value="#{ApplicationController.session}" rendered="#{ApplicationController.session == 'custom'}" required="true" />
                            </h:panelGroup>

                        </h:panelGroup>

                        <h:panelGroup>Maximum allowed users</h:panelGroup>
                        <h:panelGroup>#{ApplicationController.settingValue('MaxUsersActive')}</h:panelGroup>
                    </h:panelGrid>
                  <h:commandButton value="Submit" action="#{bean.submit}"/>


                </div>


// And managed bean

private String session = "six";

    public String getsession() {
        return session;
    }

    public void setsession(String session) {
        this.session = session;
    }