html JavaScript or asp.net Tri-State TreeView Control

Hi Guys:
Looking for a Tri-State TreeView control it seems commercial ones are expensive 
and the code to build one complicated to say the least.
Before I waste a ton of time and gray matter trying to build one, has anyone 
used one that works with a Screen Reader?
Anyone have some code that worked floating around?
If not I'll try and build one but it sounds complicated and I don't know if the 
resultant tri-state checkbox would even be readable with a Screen Reader so 
might just waste a ton of time.
Let me know if you've used a Tri-State TreeView, html JavaScript or asp.net 
version, either third party, open source  or one you built yourself so I know 
if this might be doable somehow.
Rick Farmington Mich. USA

Other related posts: