Pop-up message "Please Wait" while searching?
 

Our store has about 250,000 products. So, the searches take some time.
Is there a way to add a pop-up message to remind the user to wait while the search is in progress?

I see a pop-up (using AJAX?) when I click to pay with a credit card. How to do same thing with the search?

Thanks in advance for any advice and/or help,
Mike T.