A while back I wrote a Quicklook plugin that displayed some text related to image files.
But I wanted to be able to show additional information when the user clicked a button or hovers over an image . The plugin uses a HTML construction to put the preview together. Apple has examples on how to do this in its Qucklook Plugin introduction . So I am not going to go into that here. But what I was missing was how to use Jquery. The Quicklook plugin is sandboxed and is not allowed to load any data from the outside world.
The simple answer is add the jquery Library file to your bundle and then reference it in the html.