Someone

ON *:TEXT:!setwhois*:#:{
  if ($nick isop $chan) || ($nick ishop $chan) && ($2 == ON) {
    set %whois $+ $chan  ON
    notice $nick Whois Check for $chan is Now On!
  }
  if ($nick isop $chan) || ($nick ishop $chan) && ($2 == OFF) {
    set %whois [ $+ [$chan] ] OFF
    notice $nick Whois Check for $chan is now off!
  }
}
ON *:JOIN:#:{ 
  if (%whois $+ $chan == ON) || if (%whois $+ $chan == $NULL) {
    set %whoischan $chan 
    whois $nick 
  }
  raw 319:*:{ 
    if (%whois) { 
      msg %whoischan  $2 is on:4 $3-    
      unset %whoischan 
    } 
  } 
}