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With version 2011 there was an ActiveX example provided in
C:\Program Files\Autodesk\Navisworks Simulate 2011\api\COM\examples\ACTX_01\ACTX_01.html
So there is a possibiltiy, provided you install a licensed version of Simulate on your web server.
But I don't know how it has evolved in version 2014
There's still plug-ins, but you still need to install something, which is usually the second question after "free license". Usually better off just installing Freedom and be done with it.