You can do that on server side by adding onchange="submit();" to
<h:selectOneMenu id="fn" ...> and in getDimsStructToDisplay() create the proper
values for <f:selectItems value="#{jspFormEPFService.dimsStructToDisplay}" /> in
<h:selectOneMenu id="dimStructure"... >
If you want to do that without reload of the page, use ajax4jsf instead of
onchange="submit();" with
<h:selectOneMenu id="fn" style="width:150px" value="#{
jspFormEPFService.functionLabel}" >
<a4j:support event="onchange" reRender="dimStructure" />
<f:selectItems value="#{jspFormEPFService.functionsToDisplay}" />
</h:selectOneMenu>
Holger
