Keep side menu visible

I've got a side menu.. Action Box on this page:

I want it to stay where it is as you scroll down, until you get to the text "action box"
At that point, I want to freeze that box in the upper left corner as you scroll down.

When you scroll back up it will go back to its original place.

Can you point me in the right direction?
Who is Participating?
M256Author Commented:
One doesn't work in Internet Explorer.  The other has a delay/lag.
Also, both move immediately when you scroll.
I want it to stay fixed until I scroll beyond the top of the side menu.
Gurvinder Pal SinghCommented:
M256Author Commented:
This looks like a good start:

How do I keep the content inline until the user scrolls past it?
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