pixel locations of selection in RevBrowser

[Richard Gaskin]

I need to know the pixel locations of the bounds of range of selected 
text in a RevBrowser pane.

I don't necessarily need the horizontal locations, but the vertical 
locations are essential, the top and bottom of a selected range of text.

I've considered making a JS callback, but can't find a JS library which 
will return those coordinates.

Anyone here solve such a problem before?

--
  Richard Gaskin
  Fourth World
  Revolution training and consulting: http://www.fourthworld.com
  Webzine for Rev developers: http://www.revjournal.com