Hi I have very complex jsf page that I have stripped down to this one,

<f:view>
<a4j:form id="testForm">
<a4j:log level="ALL" popup="false" width="600" height="400" />
<h:selectOneMenu id="commArrangementCode"
value="#{compPlanViewerMB.compPlanSearch.commArrangementCode}"
valueChangeListener="#{compPlanViewerMB.caoChangeEvent}">
<f:selectItem itemValue=" " itemLabel=" " />
<f:selectItems value="#{contextRefData.commArrgmtOffices}" />
<a4j:support event="onchange" reRender="caoNameTest"/>
</h:selectOneMenu>
<h:inputText id="caoNameTest" value="#{compPlanViewerMB.commArrangementName}" />
</a4j:form>
</f:view>

Basically in this jsp, on the change of htmlSelectOneMenu the textBox is reRendered with the value of the selected Option.

Now I want to achieve the same functionality using a custom JSF component, Can you please let me know what should be the code for this.
I also have posted same kind of issue here at ...
http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4187157#4187157

This is something I have not seen on net so far and I am still getting it on my nerves. Any help will be welcome.

Thanks
Ahsan