Possible to embed local stored assets in a html-page on a webserver?

For my current project i need to know something about unity´s sandbox handling.

I have an online project which works great on the web.
However my client asked about the possibility for an “offline” solution as well.
Usually with unity its no problem to do so, only by building the whole project and distribute the files. All things are stored and loaded from disk.

Unfortunately if my index.html needs to sit on the webserver for getting some other data, is it possible to store and load all my scenes and assetbundles from local disk?
Can i embed local assets in this html page?

(I suppose it doesn´t work, but maybe someone could give me a clear answer on that…)
Thanks

If the unity3d file is fetched from the local hard drive then content can be loaded from the same folder. If the unity3d file is hosted on a webserver then the webplayer has no access to the local hard drive. I have no experience embedded a unity3d file into the html page, although I know some browsers support this for images.