I think that js doc was shifted:

http://synchro.net/docs/jsobjs.html#bbs_properties

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node_val_user number  3.10  feedback messages sent during this session
logon_ulb number  3.10  messages read during this session
logon_dlb number  3.10  menu subdirectory (overrides default)
logon_uls number  3.10  menu file (overrides default)
logon_dls number  3.10  total main menu commands received from user
during this session
logon_posts number  3.10  total file menu commands received from user
during this session
logon_emails number  3.10  current message group
logon_fbacks number  3.10  current message sub-board
posts_read number  3.10  current message sub-board internal code
menu_dir string  3.10  current file library
menu_file string  3.10  current file directory
main_cmds number  3.10  current file directory internal code
file_cmds number  3.10  remote connection type
curgrp number  3.10  login name given during RLogin negotiation
cursub number  3.10  password specified during RLogin negotiation
cursub_code string  3.14  terminal specified during RLogin negotiation
curlib number  3.10  client name
curdir number  3.10  current alternate upload path number
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