[Users] Tree Question?

[Ian Turton]

I have a hurricane and weather viewer
(http://ian01.geog.psu.edu/geoserver/www/maps/jessica-groups.html)
which I'm pretty happy with but I have one question about the layer
tree.

Is it possible to add a checkbox to the wave heights sub tree to turn
them all off ? I need to keep them in the separate tree (I think) so
that they are in the checkbox group so you can only turn one on at a
time but sometimes I want to turn off all wave heights.

Ian

-- 
Ian Turton