Example 1

example1.js

(function(){ //opens the closure
	
	//definition of private object Animal
	var Animal= function(){
		this.name="";
	};
	
	Animal.prototype={
		getAnimal : function(code){
			if(code=="c"){
				this.name="Cat";
			}
                        else if(code=="d"){
				this.name="Dog";
			}
			else{
				this.name="unknown";
			}
		}
	};


	//myLib public interface
	window.myLib = {
		selectAnimal : function(code){
			var selector=new  Animal();
			selector.getAnimal(code);
			return selector.name;
		}
        };

})(); //closes the closure

//Call selectAnimal publicly
window.myLib.selectAnimal();