WebFC
html5 interact communication tools
Json type for websocket:
ErrorMessage : errors from the server errorWord
AlertMessage : some alert alertWord
doodleTable : the doodle function from the user drawElement index
doodlePic : the pic of canvas from a user data to -- the user name of the pic sending to
requestPic : when a new user enter the room, the server send this message to a user to request the pci of canvas from -- the user name of the requesting from
SaveTableDoodle : save the current doodle of table
drageMessage : message about drag movement : begin or stop or move or save