Support for img maps

[mykael22000]

Can we support passing a variable containing an img map structure on an img call?

[img[passage][$map]]

The map would define a series of geometric regions within the image, with the name of the passage to link to and any tail actions to be taken if the region is clicked on.

Support for mouse over and click image fragments would be nice, but isn't essential. If you look at doing this you might be better using [imgmap[$map]] and putting the reference to the image passage(s) somewhere in the map structure.