If we had a place for storing information related to a document,
(do we? There's talk about a "Hyperdoc" type in HTAnchor.c, but
it's never flushed out.), then the size (as a number) should be
put there. Then all those browsers that currently give transfer
status in bytes could give it as a percentage.
A browser could implement a selection for http-served documents
which invokes a HEAD to find out this kind of information. If
this info included the time changed, it could be compared against
the global history.
-- <a href="http://info.cern.ch/roeber/fgmr.html">Frederick</a>