Which layout to use for an app that's height keeps increasing?

Hey All,

I'm hoping someone can give me some advice on which layout to use... (So little time, so may layouts... ).

Our app is designed to dynamically add containers / panels as the user interacts with it. The app basically uses a fixed width and the panels are appended so that the app grows vertically.

Our problem is that once we reach the limit of the vertical dimension of the browser height, the new child panels aren't rendered. No scroll bar appears.

We're currently using a layout : 'border' with some minor info in the north region and the rest of the app in the center region. Is a border layout designed to live within a browser window and never have scroll bars?

What layout would you recommend?

All help is appreciated,

F