Something

on *:text:!in &:#:{
  if ($nick(#,$nick,oh)) {
    if ($2 ison #) { msg # $2 is already in the channel ! }
    elseif ($comchan($2,0)) { 
      invite $2 # 
      msg # now inviting $2 to # ... 
    }
    else {
      .enable #ison 
      set %temp # 
      ison $2 
    }
  }
  else { msg # you have no right to request invites! }
}

#ison off
raw 303:*:{ 
  if ($2) { 
    invite $2 %temp 
    msg %temp now inviting $2 to %temp !
  }
  else { msg %temp the guy isnt online! }
  unset %temp
  halt
}
#ison end