[Mozile] OT: Range objects

[James A. Overton]

Hi Jeremy,
	I think your crazy idea is a good one. Quite clever.
	You answered your own question; walking the tree and counting text  
node lengths is the only way to convert between the offset in the  
text area and the offset in the rendered DOM fragment. Don't worry  
about the speed. DOM read operations tend to be very fast. If you try  
to do something with the Range object you'll have to worry about the  
two completely different implementations Mozilla and IE provide.
	I played with your code for a while and wrote a getElement() method  
which seems to do what you asked. I made some other small changes  
while I was hacking. You're free to use whatever you want.
	There's still some tricky work to do. Once you have the element  
where the changes occur, you're going to have to determine what text  
should belong to that element. When the selection is not collapsed  
(i.e. the start and end offsets are not the same) you'll have to  
calculate the common ancestor element for the selection, and then get  
its contents.

James

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