I'm making an ajax-enabled lab scheduling program, and some of the ajax operations aren't exactly quick.
In Gmail, when you go to your inbox, send a message, etc. the browser acts like it's loading (In FF the stop button becomes enabled, the progress bar appears), but it's not on a new page, it's done via AJAX.
How do they do this? I have a little spinny indicator, but it would be a nice touch to have the browser act like it's loading. Any ideas?