ircII help: on nickname 

Usage: ON [#|+|-|^|&|@]NICKNAME [-|^]<parameters> [action]
  This is activated whenever someone on a channel you are on
  changes their nickname. The parameters for this function are:
    $0  Original nickname for that person
    $1	New nickname for that person

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HTML Conversion by Kai 'Oswald' Seidler, osw@ld.pages.de. Last modified: 04. February 1997.