[sdiy] "Reactive Documents" and filtering

[David G Dixon]

> Did you click and drag the circle thingy in the plots to see 
> the results change? It took me a moment to realize that they 
> are interactive.
> 
> I thought it was a clever twist on the usual "type values in 
> text boxes and hit the button to see the results" approach.
> 
> Or maybe some of us are just easily amused :-)

I didn't get to the bottom of the page the first time.  In any case, all I
see are empty plots that say "Unstable" in red, and nothing I click on
moves.  Perhaps it's because I'm using Internet Exploder.