Pass Javascript Session Cookie to LiveCode Variable?

[Rick Harrison]

Greetings LiveCoders,

I have an LC server format file that uses a Javascript video player.
The video player has a nice time progress bar that shows how far
the user has played the video. All of that works just fine.

What I would like to do is check what that time completion variable
is when the user clicks on a button to leave the video so I will know
if they finished watching it all the way to the end of the video or not. 
I then want to make a note of it in my database which requires that 
I am able to send that javascript variable value over to a LiveCode
variable.

I’ve been looking at Session Cookies to see if LiveCode can read
a Javascript Session Cookie, but so far have been unsuccessful.

Ideas, code or suggestions anyone?

Thanks!

Rick