Automatic skylight tinting? I want to put a glass boundary marker around my second...

I want to put a glass boundary marker around my second story deck and was wondering if in that is any system out on the market where on earth I could throw a switch and have the chalice (material) automatically tint or opaque out. For privacy and what not. I remember reading just about office window that used an LCD and would black out beside electrical current.
How do I procure rid of ruff, gloopy,...
Answers:    There are very expensive photo chromatic systems that be on the market but these are so costly that in attendance was simply a very limted clientele. Marvin Windows have this product but I believe this was discontinued. The best bet would be to consider a skylight film similar to Vista see http://www.vista-films.com
What is the best hardwood floor to use...