ircII help: on mode

Usage: ON [#|+|-|^|&|@]MODE_CHANGE [-|^]<parameters> [action]
  This is activated whenever someone on a channel you are on
  changes the mode for that channel (see HELP MODE).  The 
  parameters for this function are:
    $0  The nickname of the person who changed the mode
    $1	The channel on which the mode was changed
    $2- The new mode settings for that channel