Doing something message while server getting shipping costs (PS1.4.9)

[smitthhyy]

Does anyone know how to add one of these little windows that pop up when the server is busy doing something?

 

In my case, when the user moves through checkout there is a delay as the server gets shipping quotes from the shipping company. It's long enough for some users to wonder if it's working and will click again (causing more delay).

 

Is this done in the theme?

 

How do I do this?

 

Thanks.

 

(forum admins, if not, could you move this to the right part of forum, thanks and appreciate).