how to refresh referenced part of page with prime faces' p:commandLink? - jsf

Question

Environment: Tomcat 6 ,jsf 2.0,prime faces 2.2.1 ,chrome explorer
I want to click the "ViewDetail" link in the left expanded tree and show the product's detail info. But the code below didn't work.
Then I add the attribute ajax="false" to the link, it seems work. But the "p:treeTable" which lies on left part of the page is
also refreshed and collapsed. So how can I do for this: click the link on the left expanded tree node, show the info on the right part
of the page,and keep the left expanded tree node still expanded.
<h:form id="BizTypeTreeTableForm" >
<p:layout fullPage="true">
<p:layoutUnit id="left" position="left" scrollable="true" width="350" resizable="true" closable="false" collapsible="true" minWidth="250" >
<p:treeTable id="BizTypeTreeTable" value="# {treeTableController.root}" var="treeTable">
<p:column>
<f:facet name="header">ProductName</f:facet>
<h:outputText value="#{treeTable.TYPENAME.value }" />
</p:column>
<p:column style="width:5%">
<f:facet name="header">Action</f:facet>
<p:commandLink value="ViewDetail" update="content" action="#{treeTableController.showDetail}">
</p:commandLink>
</p:column>
</p:treeTable>
</p:layoutUnit>
<p:layoutUnit id="center" rendered="true" position="center" style="text-align:left;" scrollable="true" >
<h:outputText value="Please click the left tree node" rendered="# {allTabManager.productObject.TypeNo.value eq null}"/>
<div id="content" class="ui-widget">
<div class="post">
<ui:insert name="content_tab" >...</ui:insert>
</div>
</div>
</p:layoutUnit>
</p:layout>
</h:form>

Answer 1

The update must point to a real JSF component in the tree, not to a plain HTML element.
Replace
<div id="content" class="ui-widget">
by
<h:panelGroup layout="block" id="content" class="ui-widget">
A panelgroup with layout="block" will render a <div> instead of a <span>.

Answer 2

I think your reference to the id is not correct since the div and the p:layout are not the same level.
But you can either try to get the absolute id by using update=":content" or update the whole p:layoutUnit:
<p:commandLink value="ViewDetail"
update="center"
action="#{treeTableController.showDetail}">