首页 > 代码库 > javascript函数中的实例对象、类对象、局部变量(局部函数)

javascript函数中的实例对象、类对象、局部变量(局部函数)

定义

 function Person(national,age)        {            this.age = age;   //实例对象,每个示例不同            Person.national = national;    //类对象,所用实例公用            var bb = 0;  //局部变量,外面不能访问(类似局部函数)        }

 

调用

           var p = new Person("中国", 29);            document.writeln("age:" + p.age);            document.writeln("object national:" + p.national);            document.writeln("Class national:" + Person.national);            document.writeln("local var:" + p.bb);            var p2 = new Person("美国", 31);            document.writeln("</br>");            document.writeln("age:" + p2.age);            document.writeln("object national:" + p2.national);            document.writeln("Class national:" + Person.national);            document.writeln("local var:" + p2.bb);            document.writeln("</br>");            document.writeln("Class national:" + Person.national);            //age:29 object national:undefined Class national:中国 local var:undefined             //age:31 object national:undefined Class national:美国 local var:undefined             //Class national:美国