title: SelectOneMenu updates other SelectOneMenu
body: <p>I want to update the second SelectOneMenu when I select any item of the first SelectOnMenu. As it is now, I get the values for the SelectOneMenus from a ManagedBean. I guess I've to use AJAX (jquery) to send parameters to the ManagedBean.</p>
  
  <pre><code>&lt;h:form&gt;
      &lt;div class="center"&gt;
          &lt;h:panelGrid id="editTable" columns="2" styleClass="center"&gt;
              ...
              &lt;h:outputText value="#{msg.timetable_list_category}" /&gt;
              &lt;h:selectOneMenu class="category"&gt;
                  &lt;f:selectItems value="#{categoryBackingBean.categorys}" var="c"
                      itemLabel="#{c.category_Name}" itemValue="#{c.id}" /&gt;
              &lt;/h:selectOneMenu&gt;
  
                  &lt;h:outputText value="#{msg.timetable_list_seminarblock}" /&gt;
              &lt;h:selectOneMenu class="seminarblock"&gt;
                  &lt;f:selectItems value="#{seminarblockBackingBean.seminarblocks}" var="s"
                      itemLabel="#{s.seminarblock_Name}" itemValue="#{s.seminarblock_Id}" /&gt;
              &lt;/h:selectOneMenu&gt;
              ...
          &lt;/h:panelGrid&gt;
          ...
      &lt;/div&gt;
  &lt;/h:form&gt;
  </code></pre>