Thanks, Jim! I've incorporated your changes into the script.
I had already set a '$divWidth' in the main script, but it wasn't being referenced in the includes file. I've changed your $iframeWidth to '$divWidth' and re-established the communication of it between the main script and the includes file. New zips are up for the GOES16 and GOES17 GIF scripts
on my scripts page. I've given you a nod in the credits as well.
What Jasiu is talking about is I've asked for his help with my attempt to allow persistence of user-selected Satellite Views using cookies. It works in PHP 7.0 on
my testing server, but throws an error about resent headers in PHP 5.4.19
on my site. You can refresh the page on my testing server or set Widescreem on the lower left and the selection persists.