Java EE (Java Enterprise Edition) General Discussion

Hello,

I have a small question regarding JSF <h:panelGroup rendeed="false">

I have the following in my jsp page

<h:panelGroup rendered="false">
    <script type="text/javascript">
        alert('ok');       
    </script>
</h:panelGroup>

I would expect the alert inside javascript shouldn't be firing because rendered is false, however when I run the page, alert is firing.
What could be the reason for this?