浅析JavaScript的prototype

        function Student(name){
            this.name=name;
            this.showName=function(){
                alert("my name is "+this.name);

            };
        }

new Student(‘a‘).showName();

        Student.showAge=function(){
            alert(‘age is 20‘);
        }

Student.showAge();

        Student.prototype.sayHello=function Hello(){
            alert(‘hello‘);            
        }

new Student(‘a‘).sayHello();