gistfile1.js

var MyObject = function(ctor) {

  var $this = this;

  this.foo = function() {
    console.log("foo called");
  }

  this.bar = function() {
    $this.foo();
  }

};

function MyClass(name) {
  this.name = name;
  this.$this = this;
}

MyClass.prototype.foo = function() {
    console.log("foo called");
  }

MyClass.prototype.bar = function() {
    $this.foo();
  }