Htmlviewer and css

I want to display some html in an htmlviewer. This is a local file. I can get the html to display but the file has references to css and other files that are in an assets directory.

Whats the best way to get the css files referenced?

Where are those assets ? online ? local ?

What happens when you simply double click on the file ?

Double click on file everything is fine. It displays in firefox like i would expect.

Everything is local at this point.

So the reference inside the html is assets/something.css

The files were created with mobirise. Basically an html file with css and other files in the assets directory.

Upload both the html file and the assets directory to a webspace, keep them at the same relative place to each other, and point to the html page in the HTMLViewer.