gistfile1.js

/* this is how you make objects and classes in javascript */

var Dog = function(name) {
  this.name = name;
}
Dog.prototype.bark = function() {
  alert('Pleased to meet you, my name is '+this.name+'.');
}

// instantiation
var pluto = new Dog('Pluto');

// send message 'bark'
pluto.bark(); // windows pops up, saying 'Pleased to meet you, my name is Pluto.'