Submit button is missing

I'm fairly new to configuring ckeditor .. but I can see submit button here .. in my localhost setup

http://localhost/ckeditor_4.1.0/samples/replacebycode.html

view source of sample to see where it is placed inside a form.

Here is my basic code ..

<form action="../ckeditor_4.1.0/samples/sample_posteddata.php" method="post">
<textarea class="ckeditor" id="editor1" name="editor1">&lt;p&gt;Initial value .. editor1.&lt;/p&gt;</textarea>
    
<script type="text/javascript">
CKEDITOR.replace( 'editor1' );
</script>

<p>
<input id="submit_editor1" type="submit" value="Submit">
</p>
</form>

It could be that your button has been truncated by the height of container div.   Mine is hidden at the moment.

Note that submit example only works if you are in a PHP server environment.