der({
      type: "double",
      postfix: " miles",
      step: 10000,
      from: 25000000,
      to: 35000000,
      onChange: function (obj) {
        var t = "";
        for (var prop in obj) {
          t += prop + ": " + obj[prop] + "\r\n";
        }
        $("#result").html(t);
      },
      onLoad: function (obj) {
        //
      }
    });
  });
</script>
</body>
</html>
