javascript没有类，但有对象。下面是javascript面向对象时调用的三种办法。

第一种：

function Student(name){  this.name = name;  this.hello = function(){    alert('hello, '+this.name+'!');  }}var xiaoming = new Student('小明');xiaoming.name;xiaoming.hello();

第二种

var Student = {  name: '',  hello:function(){    alert('hello,'+this.name+'!');  }}var s = Student;s.name = "小明";s.hello();

第三种

var Student = {  name: '',  hello:function(){    alert('hello,'+this.name+'!');  }}function createStudent(name){  var s = Object.create(Student);  s.name = name;  return s;}var xiaoming = createStudent('小明');xiaoming.hello();