I want to...

(1) Get the current browser scroll position/value when clicking this:
<a href="#menu">MENU</a>

(2) Return to the last stored scroll position when click this:
<a href="#top">RETURN TO CONTENT</a>
...with #top being a non-JS fallback

I can do everything to complete this, it's just the getting and setting of the browser scroll value I could do with some help on.

...and most importantly to do this without jQuery (or any other library).

I also want it to be completely cross-browser compatible.