JavaScript method nine of writing classes_js object-oriented

//Define the package name
YAHOO.namespace("test");

//Define the class
YAHOO.test. Person = function(name) {
this.name = name;
}
YAHOO.test.Person.prototype.setName = function(name){ this.name = name;}
YAHOO. test.Person.prototype.getName = function(){ return this.name;}


//Create an object
var p = new YAHOO.test.Person("jack");

console.log(p.getName());//jack
p.setName('tom');
console.log(p.getName());//tom

//Test whether instanceof and p.constructor correctly point to YAHOO.test.Person
console.log(p instanceof YAHOO.test.Person);
console.log(p.constructor == YAHOO.test.Person);