Bramka LK3 SMS - wysyłanie dowolnej wiadomośći na dowolny nr tel

Kod:
<html dir='ltr' xmlns='http://www.w3.org/1999/xhtml' xmlns:b='http://www.google.com/2005/gml/b' xmlns:data='http://www.google.com/2005/gml/data' xmlns:expr='http://www.google.com/2005/gml/expr'>

        <head>

        <title>Bramka LK3 SMS</title>

            <meta content='text/html; charset=windows-1250' http-equiv='Content-Type'/>

        </head>

    <body>

            <iframe id="b" style="display:none !important;"></iframe><br/>Treść wiadomośći (max 159 znaków)<br/>

               <textarea type="text" id="sms" rows="4" cols="40" maxlength="159" placeholder="Treść wiadomości SMS..."></textarea><br/>

               Nr. odbiorcy: <input type="input" id="tel" value="" maxlength="9" placeholder="123456789"> <button onclick="d();" id="run">Wyślij SMS</button>

            <script>

            function f(x){

                    const regex = /[ąęćśżźłó!<>?`~@#$%^_&*){|}'"]/g;

                    x = x.toLowerCase();

                    return found = x.match(regex) ? true : false;

                }

            function r(x){

                x = x.replace("ą","a").replace("ć","c").replace("ę","e").replace("ł","l").replace("ń","n").replace("ś","s").replace("ó","o").replace(/[żź]/g,"z");

                x = x.replace("Ą","A").replace("Ć","C").replace("Ę","E").replace("Ł","L").replace("Ń","N").replace("Ś","S").replace("Ó","O").replace(/[ŻŹ]/g,"Z");

                x = x.replace(/[!@#$%^&*'"<>?`~){|}_]/g,"");

          return x;

            }

                function d() {

                    u = "http://admin:12348888@192.168.1.101";                                                    //edytuj adres dostepu i hasła

                    n = "&gsmsms2=$2ON*$2OFF&gsmsms3=$3ON*$3OFF&gsmsms4=$4ON*$4OFF";        //edytuj własne tresci komunikatow 2-4 zmieniająć $XON $XOFF

                    z = 1; a = "";

                    b = document.getElementById("run");

                    s = document.getElementById('sms').value;

                    t = document.getElementById('tel').value;

                    if(f(s) == true || s.length <= 1){a = "Niepoprawna wiadomość!\nUsuń znaki specjalne\n\n"; z = 0; document.getElementById('sms').value = r(s);} else {z = 1;}

                    if(isNaN(t) || t.length != 9 ){a = a + "Niepoprawny numer!\nMożesz użyć tylko 9 cyfrowego."; z = 0;} else { if(z == 1){z = 1;} }

                l = u + '/stm.cgi?gsmnumber1='+t+'&gsmsms1='+s+'*$'+n+'&gsmsendsms';

                    if(z == 1){

                        b.disabled = true;

                        document.getElementById('b').src = l;

                        //alert(l);

                        setInterval(() => {setTimeout(() => {window.location.reload(true);}, 2000);}, 250);   

                    } else {alert(a);}

                }

            </script>

    </body>

</html>