OT non LC: cross tab/window browser communication

Mike Bonner bonnmike at gmail.com
Tue Nov 22 15:02:58 EST 2016

I have a problem I need to solve with a web page i've set up.. On my page
(my domain) I have forms that submit to an external domain (paypal) and
open a new named tab on submission.  I need to be able to block further
actions until the paypal page load is complete.  Currently, I have simply
set up a timer with an overlay and visual feedback letting the user know
that "stuff is being done,"  but since the response time from paypal can
vary greatly, I'm hoping there is a way to know when the tab has completed
loading, with a backup "max time" so that if the paypal load barfs, page
functionality is still returned.

Is this sort of thing possible?  I've researched, but if it can be done
apparently my search terms aren't the correct ones.

Thanks in advance for any help.  I'm afraid javascript (other than very
basic stuff) is not one of my strengths.

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