Adding AJAX to your component
From Joomla! Documentation
This is a very interesting approach. I would like to have some more information concerning this approach and I'm willing to help to improve the article
Content-Type Header[edit]
As I tried that in a component in Joomla 1.5, I needed to to set the content-type of the response to xml: header("Content-type: text/xml"); Joomla does't seem to check the type of content in the output buffer to make the correct settings (which is good).