Using-THIS.js

var fullname = 'John Doe';
var obj = {
   fullname: 'Colin Ihrig',
   prop: {
      fullname: 'Aurelio De Rosa',
      getFullname: function() {
         return this.fullname;
      }
   }
};

console.log(obj.prop.getFullname());

var test = obj.prop.getFullname;

console.log(test());

console.log("-----");

console.log(test.call(this));
console.log(test.call(obj));
console.log(test.call(obj.prop));

console.log("-----");

var boundFuction1 = test.bind(obj);
var boundFuction2 = test.bind(obj.prop);

console.log(boundFuction1());
console.log(boundFuction2());

/*
Aurelio De Rosa
John Doe
-----
John Doe
Colin Ihrig
Aurelio De Rosa
-----
Colin Ihrig
Aurelio De Rosa
*/