add comments to the js client part 2
add comments to the js client part 2

ControlSystemStudio/diirt,richardfearn/diirt,berryma4/diirt,diirt/diirt,ControlSystemStudio/diirt,berryma4/diirt,diirt/diirt,berryma4/diirt,richardfearn/diirt,diirt/diirt,berryma4/diirt,ControlSystemStudio/diirt,diirt/diirt,richardfearn/diirt,ControlSystemStudio/diirt