title: block text on ckeditor
body: <p>I have a problem and I do not know very well how to solve, I need to block a part of a text that is inside <code>ckeditor</code> so the user does not delete and does not change that part of the text, but it can complement the text only can not change that part</p>
  
  <pre><code>&lt;textarea name="editor1" id="editor1" rows="10" cols="80"&gt;
              &lt;p&gt; This part can not be changed &lt;/ p&gt; &lt;p&gt; This one can &lt;/ p&gt;
  &lt;/textarea&gt; 
  </code></pre>
  
  <p>jquery </p>
  
  <pre><code>&lt;script&gt;
   CKEDITOR.replace( 'editor1' );
  &lt;/script&gt;
  </code></pre>
  
  <p>I thought of some <code>css</code> or <code>javascript</code> code that blocks this change</p>