javascript最常用与实用的创建类的代码

//以构造函数方式添加私有属性和方法 
function Person(name, age, address) { 
this.name = name; 
this.age = age; 
this.address = address; 
} 
//以原型方式添加公有属性、方法 
Person.prototype = { 
constructor: Person, 
showName: function () { 
alert(this.name + this.age + this.address); 
} 
} 
//使用 
var person = new Person("zhangsan", 22, "中国北京！"); 
person.showName();