How to make the ckeditor field a Html5 'required' one

Hi:

I have the ckeitor working in a field, but I am unable to make the field a HTML5 required one (http://www.w3schools.com/tags/att_textarea_required.asp).  The other input fields that are coded 'required' are working as expected, but just not this one: Form submissions are still occurring when the ckeditor field is empty.

Here is the code that I am using:

     <textarea class="ckeditor" cols="80" id="info" name="info" rows="10" required></textarea>

I would be grateful if someone can tell where I am going wrong?

Thanks