on *:JOIN:#:{
  if ($chan == #mirc) { 
  halt } 
  if ($chan == #irchelp) {
    halt
    if ($nick == Mythbuster) {
      msg $chan Hey people Mythbuster has just joined $chan !
    }
    elseif ($nick == Mythbuster6) { 
      msg $chan Hey people Mythbuster6 has joined $chan !
    }
    else msg $chan Welcome $nick in this channel!
  }
}