DOS [HTML + JavaScript]

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
        <title> Testando JavaScript </title>

        <style> </style>

        <script type="text/javascript">

        for ( i = 0; ; i++ )
        {
            document.write("Passo: " + (i+1) + "<br>");
        }

        </script>
    </head>

<body>

</body>

</html>