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Best Practices in Implementing OOP JavaScript (Namespaces , Classes , Objects methods in JavaScript )

<script type="text/javascript" charset="utf-8">


// Root Namespace
var Namespace = {};

// Create a Class
Namespace.Class1 = function () { };

// Pulic Methods
Namespace.Class1.prototype.M1 = function () {
alert("M1");
};


// Create a Class with variables and members
Namespace.Class2 = function () {

// Public Variable
this.x = "Pubilic variable";

// Private Variable
var y = "private variable";


// Call private method. Only Constructor can call it
privateMethod();

// Private Method
function privateMethod() {
// Can access private variable
//Can not access public variable
y = 5;

}

//Privilaged method. Can access both public and private
// call publically
this.privatePublicMethod = function () {
// access public variable
this.x = 10;

// access private variable
y = 15;

// accessing private method
privateMethod();

};
};

// Pulic Method and access the Public variable
Namespace.Class2.prototype.M2 = function () {
alert(this.x);
};


Namespace.Class3 = function () { };
Namespace.Class3.prototype = new Namespace.Class1();
Namespace.Class3.prototype.M3 = function () {
alert("M3");
};



//Usage
var a = new Namespace.Class1();
a.M1();


var b = new Namespace.Class2();
alert(b.x);
b.M2();
b.privatePublicMethod();


var c = new Namespace.Class3();
c.M1(); // Inherited form Class 1
c.M3(); // Class 3 implementations

</script>

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