function send-wakeonlan{
    param(
        [string]$mac)
    if (!($mac -like "*:*:*:*:*") -or ($mac -like "*-*-*-*-*")){
    write-error "mac address not in correct format"
    break
    }

    $string=@($mac.split(":""-") | foreach {$_.insert(0,"0x")})
    $target = [byte[]]($string[0], $string[1], $string[2], $string[3], $string[4], $string[5])

    $UDPclient = new-Object System.Net.Sockets.UdpClient
    $UDPclient.Connect(([System.Net.IPAddress]::Broadcast),4000)
    $packet = [byte[]](,0xFF * 102)
    6..101 |% { $packet[$_] = $target[($_%6)]}
    $UDPclient.Send($packet, $packet.Length) | out-null
}

function wake-computer{
    param(
        [string]$computername)

    switch ($computername)
    {
        "tv" {$mac = "6C:62:6D:87:DB:A5"}
        "seeker" {$mac = "0C:0C:0C:0C:01"}
        "server" {$mac = "00:22:15:88:AE:29"}
        "virwin" {$mac = "F4:6D:04:34:06:91"}
    }

    if ($mac){
    send-wakeonlan -mac $mac
    }
    else{WRITE-WARNING "Unknown computername: $computername"
    }
}


"example"
wake-computer -computername tv