Someone

on *:TEXT:!whois*:#: {
  if ($nick isop $chan || $nick ishop $chan || $nick == Mixturee) { 
    if ($2 == on) { 
      set %check on 
      notice $nick 14I will now whois users on join. 
      halt
    } 
    elseif ($2 == off) { 
      unset %check 
      notice $nick 14I will no longer whois users on join. 
      halt
    } 
    elseif ($2 != on && $2 != off) {
      notice $nick 1Please use !whois on or !whois off
    } 
  } 
}
on *:JOIN:#:{ 
  if (%check == on) { 
    enable #GroupRaw 
    whois $nick 
    set %whois.nick $nick 
    set %whois.dest $chan 
  } 
  else { halt } 
} 
#GroupRaw off
raw 319:*:{ 
  if (!%whois.dest) { halt } 
  var %chans $3- 
  msg %whois.dest 7[14Channels7] %whois.nick 14is on:7 $3- 
  unset %whois.* 
  disable #GroupRaw 
} 
#GroupRaw END