objConstructrion.js

// Object construcion exemple

function MyClass() {
	this.myProperty = 'foo';
}

// Whitout new
var myInstance = {};
MyClass.call( myInstance );
console.log( 'without ' + myInstance.myProperty );

// Whit new
var myInstance = new MyClass();
console.log( 'with: ' + myInstance.myProperty );