Troubleshooting - Content being stripped away
The JCK editor is known for being very good at respecting and handling code however, you can perform a quick test by switching backwards and forwards between the source code and wysiwyg mode. If your code is being transformed or stripped out before saving the article, then it points towards the editor.
If it is being stripped out after being saved to the database then its likely to be joomla!’s Article Filtering. Of course this is all on the presumption that your code is valid HTML, if not your web browser will strip out anything it can't read even before the editor or Joomla gets a chance to interpret your code.
- For help on setting up your content filtering please see: Configuration: Text Filtering