small script that pops up a 'processing' image - while a cgi script is in progress

Need something like expedia has -- I have an affiliate script that takes some time to process and write to the db -- when a user presses submit, I would like a window to pop up that has an animated gif -- I'll create -- that keeps running -- when the cgi script is done, the page changes -- when the page changes, I'd like the popup to close.... ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Complete ownership and distribution copyrights to all work purchased. ## Platform html/cgi