gistfile1.js

//Constructor
var Person = function (name, age){
    //private properties
    var priv = {};
    
    //Public properties
    this.name = name;
    this.age = age;
    
    //Public methods
    this.sayHi = function(){
        alert('hello');
    }
}

// A static method; this method only 
// exists on the class and doesn't exist 
// on child objects
Person.sayName = function() {
    alert("I am a Person object ;)");  
};

// An instance method; 
// All Person objects will have this method
Person.prototype.setName = function(nameIn) {
    this.name = nameIn;  
}

// Tests
var per = new Person('John Doe', 22);

//Shows alert
Person.sayName();

//TypeError: Object [object Object] has no method 'sayName'
per.sayName()

//Show alert
per.sayHi();

//John Doe
per.name;

//22
per.age;

per.setName('Jane Doe');

//Jane Doe
per.name;