VDF15 with Ajax 2.0
I have a .asp page with 5 data entry tabs.

Sometimes when it loads it can take a while, 5 to 30.

Is there any way of showing the user that should wait and not do anything until the data appears on the page:
. changing the background colour would be nice, or
. popping up a message that automatically disappears when done.

Any thoughts would be appreciated.