function superClass() {

  this.bye = superBye;
  this.hello = superHello;
  
  function superHello() {
    return "Hello from superClass";
  }
  
  function superBye() {
    return "Bye from superClass";
  }
}

function subClass() {
  this.inheritFrom = superClass;
  this.inheritFrom();
  this.bye = subBye;
  
  function subBye() {
	return "Bye from subClass";
  }
}

var newClass = new subClass();
alert(newClass.bye());
alert(newClass.hello());

We have a super class , superClass, and a sub class, subClass. superClass defines two methods: bye() and hello(). subClass inherits these two methods by:

this.inheritFrom = superClass;
this.inheritFrom();

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