How to distinguish MovieClip from Object

Hi! I’ve got to do a parameter check for a method. That parameter can be an Object, like:

{ width:100, height:150 }

or a MovieClip.

How can I know if the passed parameter is a MovieClip or a simple Object?

  • The typeof operator gives me always object
  • The is and instanceof operators return me true anyway if I test MovieClip over Object.

Is there a way to directly know the final class of an object?