JavaScript Mixin Pattern

gistfile1.js

var Person = function(name) {
  this.name = name
}

var GreeterMixin = function() {
  this.greet = function(name) {
    return "Hello " + name + ", I am " + this.name
  }
}

GreeterMixin.call(Person.prototype)

var john = new Person('John')
console.log(john.greet('Pete'))  // Hello Pete, I am John