Thank you. I think this may be something in the direction of
what I'm trying to do...
Previously, using the JPL site, I was able to put together a URL
that included all the orbital elements as arguments. That is, if you
went to an address such as this in your browser:
...and the orbit view comes up. But then the pseudo-MPEC consists of two
separate files; I'd rather the whole thing was "bundled" into mpec.htm.
I can insert the applet directly into mpec.htm. But then the applet
starts up as soon as you load the pseudo-MPEC, which is annoying. Still
looking for a way to get the previous behavior. It's probably something
simple that I'm overlooking.