interaction between jsps..refresh caller jsp

Hi,

I have the following problem:

1) main.jsp starts a thread in the AppBean and calls status.jsp:
2) status.jsp displays "please wait.."
3) the status.jsp closes after finishing the task but without refreshing the main.jsp ..:-((

How can I make the status.jsp refreshing the main.jsp???

main.jsp:
======
<jsp:useBean id="task" scope="session"   class="AppBean"/>
<script>
window.open("http://localhost:8080/servlet/status.jsp","sub","height=30,width=200,location=100");
</script>

status.jsp:
=======
<jsp:useBean id="task" scope="session"   class="AppBean"/>
<% if ( task.isDone() ) {%>
  <script>window.close();</script>
<% else {%>
please wait.
<% }%>

I have tryied :
<script>parent.window.opener.location.reload();window.close();</script>
but the "task" was null??

any ideas please!!!