I'm unable to select second class of `notification`.

```
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div>
  <label for="vzdevek">Vzdevek</label>
  <input type="text" id="vzdevek" />
  <small class="notification">Username required!</small>
</div>
<br />
<div>
  <label for="komentar">Komentar</label>
  <textarea id="komentar"></textarea>
  <small class="notification">Comment required!</small>
</div>

```

I can select ***first*** class for notification using `(".notification:first")`, but for ***second*** class is not working if I use this selector: `(".notification:nth-child(2)")`

> 
> JSfiddle link: <https://jsfiddle.net/ss2pkjsw/>
> 
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