Anyone have an example of displaying a loader ani while waiting for a lengthy ajax call using the overlay? I've contemplated the following flow:

1. display an overlay with the loader
2. Make the ajax call myself with jquery
3. On the callback, inject the results into a container
4. Make a 2nd overlay call on the injected container
5. Hide the loader overlay

Anyone already done this and can provide a URL?? Or, have another idea.