title: How to re-render component in a different h:form?
body: <p>I know there is a attribute called "update", I can use it like this, <code>update="another component's id"</code>, but this doesn't work when they are in different <code>&lt;h:form&gt;</code> tags.</p>
  
  <p>For example, the code like this,</p>
  
  <pre><code>&lt;ui:composition&gt;
      &lt;ui:define name=""&gt;
  
          &lt;div&gt;
  
          &lt;h:form&gt;
  
              &lt;p:panel header=""&gt;
                  &lt;h:panelGrid id="display"&gt;
                  &lt;/h:panelGrid&gt;
              &lt;/p:panel&gt;
  
          &lt;/h:form&gt;
  
          &lt;h:form&gt;
  
              &lt;p:dialog id="dialog"&gt;
                  &lt;p:dataTable onRowSelectUpdate="aa.bb.display"&gt;&lt;/p:dataTable&gt;
              &lt;/p:dialog&gt;
  
          &lt;/h:form&gt;
  
          &lt;/div&gt;
  
      &lt;/ui:define&gt;
  &lt;/ui:composition&gt;
  </code></pre>
  
  <p>I mean, how can I write in the site of "aa.bb.display", it will re-render the panelGrid of "display" ?</p>