title: Tinymce content clear mceCleanup
body: <p>I want to clear tinymce content and add new content. i tried with following code but its getting append to the old content. how can clear the existing content from tinymce.</p>
  
  <pre><code>tinymce.activeEditor.execCommand('mceCleanup');
  tinymce.activeEditor.execCommand('mceInsertContent', false, result.content);
  </code></pre>