no mechanism for switching or hiding image after the maphilight module has been initialized

[jason-s]

I've been trying fruitlessly for an hour to switch or hide the images used in maphilight -- and finally looked at the page in Firebug and noticed that the images are wrapped in a

with a background.

1. Please document this in the how-to guide for maphilight -- it means that there are certain manipulations that won't work if you try to manipulate the raw element once maphilight is installed.
2. Please add hooks to switch or hide an image used in maphilight. I can do that with implementation knowledge of how maphilight is working, but that breaks the abstraction barrier and is ugly.