Something

on *:TEXT:!joincount-on*:#: { if ($nick ishop $chan || $nick isop $chan) {
    set %jc $+ $chan ON
    msg $chan 12Join 4Count 12is 4 now 12 ON! 
  }
}
on *:JOIN:#:{ if %jc [ $+ [ $chan ] ] == ON) 
  msg $chan 4 I 12 Have 4 Seen 12 A 4 Total 12 Of 4 %we 12 Joins 
  inc %we
}
on *:TEXT:!joincount-off*:#: { if ($nick ishop $chan || $nick isop $chan) {
    unset %jc $+ $chan
    msg $chan 4Join Count is now off :( 
  }