How can you embed a document (such as pdf) into a website and allow users to click and drag and zoom?

I am creating a mobile site that needs pdfs of maps embedded. Do to a mobile devices small size I'd like to have users be able to zoom and drag the map around and only see a portion of it at a time. Is this possible?

If not I'm not totally against creating the maps in another format that could be used.

Any ideas?