Java EE (Java Enterprise Edition) General Discussion

Hi,

I am working on JSF with ajax4jsf.

is it possible to reload only a region on button-click.(and update the values in dropdown menu)
I have a selectOneMenu tag to display items surrounded by a4j:region.

<div class="input">
					<a4j:region renderRegionOnly="false">
						<h:selectOneMenu id="Sensor" value="#{messkette.sensor}"
							converter="#{selectItemHelfer}" required="true" disabled="#{gesperrt}">
							<f:selectItems value="#{messketteEditor.alleSensorenMitBlank}" />
							<a4j:support event="onchange" reRender="Funktion, Sensormessbereich, Einheit, Sensorwarnung" />
						</h:selectOneMenu>
					</a4j:region>
					<h:message for="Sensor" styleClass="message" />
					<div><h:outputText id="Sensorwarnung" value="#{messketteEditor.sensorWarnung}" styleClass="kursiv" /></div>
				</div>	

and I have tried to put a <a4j:commandButton to reload the code above.

<a4j:commandButton value="Reload"><a4j:support event="onclick" reRender="Sensor" /></a4j:commandButton>

Unfortunatly without outcome.

What I have to do get this working


Thanks
Andreas