best practice for a wait page

We have a page with a form and the form's onSubmit() method takes a
while.  After it is complete the user is re-directed to another page.
We'd like to introduce a nice "please wait while we process your
request" page in between these pages.  If anyone has done this, what
approach has worked well for you?

public class Page1 extends ...
{
  ...
    add(new SomeForm()
    {
      public void onSubmit()
      {
        aBunchOfProcessing();
        redirect(new Page2());
      }
    }
  ...
}


Thank you,
Scott

--
Scott Swank
reformed mathematician

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