need "Working..." pop up dialog

I'm trying to get a "working..." informational dialog or window going with my PHP page but I'm not getting anywhere. Here's the situation: When the user clicks on a link that has to gunzip a very large file, I want a popup to say "Working..." while the file is uncompressing. Then, when the file is uncompressed, I want the "Working..." popup to close itself and then the parent window to load a new URL (where it will use the uncompressed file). I've tried doing this with Javascript and window.open(), but I'm having no luck. Any ideas? TIA! -- ------------------------------------------------------------------------- Ray Clouse | Don't fear the penguins. Engineer Scientist/Specialist | Boeing Expendable Launch Vehicles | Ray.Clouse AT boeing.com Huntington Beach, CA | clouse AT rayclouse.org