join modifier
i made this to learn more about inputs =]

alias join { 
  if ($1 == $null) /join $$input(Join What Channel?,e,,$(#, ))
  if ($1 != $null) { 
    if ($$?!="Are you sure you want to join $1 $+ ?" == $true) /join $1 
  }
}
on *:CONNECT: { /join $$input(Join What Channel?,e,,$(#, )) }