Can I pass in the base path / asset path when embedding Unity content in a webpage?

I am embedding a Unity game in a web page and the path to the game is different than the path to the html file of the web page. The game loads assets at run-time and is looking for these assets in the directory of the web page. Is there a way to pass in or set the base path of the game so that it will look in the proper place for its assets?

Basically, I am looking for the Unity equivalent of the Flash technique of creating the param "base" and passing it into swfobject.embedSWF.