Calculadora

<html>
    <body>
        <center>
            <input type="text" id="nombre"> <br>
            <input type="button" value="1" id="1" onclick="CommandClick1()"><input type="button" value="2" id="2" onclick="CommandClick2()"><input type="button" value="3" id="3" onclick="CommandClick3()"><input type="button" value="%" id="%" onclick="CommandClick13()"><br>
            <input type="button" value="4" id="4" onclick="CommandClick4()"><input type="button" value="5" id="5" onclick="CommandClick5()"><input type="button" value="6" id="6" onclick="CommandClick6()"><input type="button" value="x" id="x" onclick="CommandClick14()"><br>
            <input type="button" value="7" id="7" onclick="CommandClick7()"><input type="button" value="8" id="8" onclick="CommandClick8()"><input type="button" value="9" id="9" onclick="CommandClick9()"><input type="button" value="-" id="-" onclick="CommandClick15()"><br>
            <input type="button" value="0" id="0" onclick="CommandClick10()"><input type="button" value="," id="," onclick="CommandClick11()"><input type="button" value="=" id="=" onclick="CommandClick12()"><input type="button" value="+" id="+" onclick="CommandClick16()">
        </center>
        <script>
        </script>
    </body>
</html>