html table with fixed header

# Operation principles: 
ref: http://stackoverflow.com/questions/11499973/how-to-fixed-table-header-no-jquery


# Plug-in: 
ref: https://github.com/jmosbech/StickyTableHeaders 


 # Plug-in 2: with throttle.js for smoother scroll 
to-do: beautify scroller 
ref: http://tympanus.net/Tutorials/StickyTableHeaders/index3.html 


 # Plug-in doesn't work for me 
ref: http://www.fixedheadertable.com/