This is an HTML5 periodic table, with values drawn from the python module
periodictable (authored by Paul Kienzle)

To use:  copy as-is, or to keep up-to-date git clone the periodictable repository
and build locally, then run "make_periodic_json.py" to rebuild the JS database 
"periodic_table.js"

A version of this is hosted at http://ncnr.nist.gov/instruments/magik/Periodic.html