"Loading + (busy wheel)" page on POST submit?

[cs475x]

I have an email script setup and when the user touches the send button at the bottom, it refreshes (it posts the data to the same page) the page and displays a footer label showing how many emails were successfully sent. Is there a way to add an animation after the user touches the button? What I would like to do is this:

- User touches button
- Dark grey image is layered over the page with 75% opacity, displays "Loading..." and a spinning 'busy' wheel
- Image and text either fades out or disappears instantly after page load is complete

The only ways I can think of doing this is have it be an overlay while the page reloads or show that instead of a white screen...but I don't know how to do those if either are possible.

[Rich The Rocker]

U would have to use ajax.