Conditional "Legends"

[Doug Nebert]

I have a series of base maps that are being used to present a 
world to local view.  At different levels of zoom (or surrogate 
scale) I would like to display different items in the legend 
as declared in the _template.html file. It would seem that a 
scale variable could be accessible to JavaScript based on the 
current extent, yes? 

Thus I would not even show roads as an option on a global 
view and could switch layers and labels at a high level of 
zoom. I need to not use Zoom level but the derived scale 
being used for the current image.

Example javaScript solutions appreciated!

-- 
Douglas D. Nebert
Clearinghouse Coordinator 
FGDC Secretariat	Phone: +1 703 648 4151	Fax: +1 703 648-5755	
Pager Messaging: 	http://fgdclearhs.er.usgs.gov/dougmsg.html