sS hjs_imgUploadBase64Encoder() {
  ret hscript([[
    function submitWithImageConversion(form) {
      var file = $('#imgUploader')[0].files[0];
      var reader = new FileReader();

      // delay form submit until reader is done
      reader.onloadend = function () {
        var b64 = reader.result.replace(/^data:.+;base64,/, '');
        $("#img_base64").val(b64);
        console.log("Got base64 data: " + b64.length);
        $(form).submit();
      };

      reader.readAsDataURL(file);
      return false;
    }
  ]]);
}