Contact

    <script>
        // check if browser supports SMS
        if (navigator.mozSms || navigator.msSms || navigator.sms) {
            // browser supports SMS
            var smsEnabled = true;
            // display the button
            document.write('<button>Send SMS</button>');
        } else {
            // browser does not support SMS
            var smsEnabled = false;
            document.write('<button>SMS not available</button>');
        }
    </script>