Mi solucion (Numeros Pares 1-100)

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="UTF-8">
    <title>1-100</title>
</head>

<body>
    <h2>Numeros:</h2>
    <script>
        //De 100 - 0.
        var numInicial = 0;
        var numMaximo = 100;

        function saltoLinea() {
            document.write("<br>");
        }

        while ( numInicial <= numMaximo) {
            document.write(numMaximo);
            saltoLinea();
            numMaximo = numMaximo-2;
        }

        document.write("FIN");
        saltoLinea();
        document.write("---------------------------");
        saltoLinea();

        //De 0 - 100
        var numInicial = 0;
        var numMaximo = 100;

        function saltoLinea() {
            document.write("<br>");
        }

        while ( numInicial <= numMaximo) {
            document.write(numInicial);
            saltoLinea();
            numInicial = numInicial+2;
        }

        document.write("FIN");

    </script>
</body>
</html>