从另一个对象类方法调用对象及其方法

I have created some classes/objects for some animations. I created a class called Navigation(), and another class called Stars(). Each of the classes have their own methods and objects associated with them. I have created a method within the Navigation() class that attempts to run a method and the object associated to it. The Navigation class method will not run the Stars method. Again I am not calling a Stars Class method with a Navigation Class Object. I am trying to call a Stars object's method from within a Navigation Class Method, if that makes sense. I am new to OOP javascript and I am having trouble knowing the terminology for this problem to research it out. If there are any other discussions,articles, or threads to point me too that would be much appreciated. Or just a general answer to the problem.I have created some classes/objects for some an