function showMacAddress() {
    var obj = new ActiveXObject("WbemScripting.SWbemLocator");
    var s = obj.ConnectServer(".");
    var properties = s.ExecQuery("SELECT * FROM Win32_NetworkAdapterConfiguration");
    var e = new Enumerator(properties);
    var output;
    output = '';
    output = output + '';
    while (!e.atEnd()) {
        e.moveNext();
        var p = e.item();
        if (!p) continue;
        output = output + '';
        output = output + '';
        output = output + '';
        output = output + '';
    }
    output = output + '
Caption
MACAddress
' + p.Caption; +'
' + p.MACAddress + '
';
    document.getElementById("box").innerHTML = output;
}

showMacAddress();