Another scenario of BACK button problem, pls help

search.jsp ---- search application by ID
view_app.jsp ---- display application details, has 4 commandLinks eg. (A, B, C, D), the commandLinks are displayed dependent on a
property in the ApplicationBean object.
Scenario as follow:
In search.jsp, I search application #1, it brings up view_app.jsp with #1 details and commandLinks A and B available.
Then go to search.jsp again through faces, search application #2, it brings up view_app.jsp again with #2 details and commandLinks C and D available.
Then I click BACK button twice, which bring me back to view_app.jsp with #1 details and commandLink A and B.
now I try to click commandLink A, it doesn't work because faces thinks I am in view_app.jsp with #2 details and commandLink C and D, there is no commandLink A available. Therefore it displays view_app.jsp with #2 details and commandLinks C and D.
I've put the Phase Listener, I can see from the log messages that it did go through the Faces life cycle, but in the 'Invoke Application' phase, the functions that I specified in the action (fucntionA) was not called, as it does not exist in the current View.
Anyone know how to solve this situation?
I try with client or server state saving, both produce same result. I also put <h:messages> in the view_app.jsp, no validation error message was shown.
search.jsp
==========
<h:form>
<h:outptuText value="application ID:"/>
<h:inputText value="#{facade.appID}"/>
<h:commandButton value="search" action="#{facade.searchApp}"/>
</h:form>
view_app.jsp
============
<h:form>
<h:inputHidden value="#{facade.appID}"/>
<h:panelGrid columns="2">
<h:panelGrid>
     <h:commandLink value="A" action="#{facade.functionA}" actionListener="#{facade.updateApp}" rendered="#{app.displayMenu}"/>
     <h:commandLink value="B" action="#{facade.functionA}" actionListener="#{facade.updateApp}" rendered="#{app.displayMenu}"/>
     <h:commandLink value="C" action="#{facade.functionA}" actionListener="#{facade.updateApp}" rendered="#{app.displayMenu}"/>
     <h:commandLink value="D" action="#{facade.functionA}" actionListener="#{facade.updateApp}" rendered="#{app.displayMenu}"/>
</h:panelGrid>
<h:panelGrid columns="2">
<h:outputText value="Application ID"/><h:outputText value="#{facade.appObject.appID}"/>
<%--
Other details
--%>
</h:panelGrid>
</h:panelGrid>
</h:form>
Facade.java
===========
ApplicationBean appObject = new ApplicationBean();
public void updateApplication(ActionEvent e) throws Exception {
if ( appID != appObject.getAppID() ) {
logger.finest("Updating application ID from " appObject.getAppID() " to " +appID);
appObject = getApplicationFromDB(appID);
ApplicationBean.java
====================
public boolean isDispalyMenu() {
<%-- return 'true' or 'false' dependent on a property of the ApplicatinoBean object --%>
}

This is a very simple method for locking back button. It works fine. Maybe it will be usefull for you and it could resolve other problems with back button.
<f:view>
<script>
function windowunload()
//myform:_idcl is the hidden field on html page generated by JSF for navigation
//purposes
     if (document.forms['myform']['myform:_idcl'].value=="")
//erroraction - this is the name of the method in the backing bean; if there is no
//such a method (or action is not set in faces-config) the page will be reloaded;
//thanks to that one can forward to another for instance error page
          document.forms['myform']['myform:_idcl'].value='myform:body:erroraction';
          document.forms['myform'].submit();
          return false;
</script>
<body onunload="windowunload()">
<h:form id="myform">
</h:form>
</body>
</f:view>
It submits with no action argument (no erroraction method or navigation not set in faces-config) the page on onunload event.
It reloads the page when when user presses back button or tries to change url address. So only one way to navigate is to use commandlinks and commandbuttons from your page.
I haven't found any weaknesses of this method yet.
Regards
M.

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