本文实例讲述了JavaScript使用prototype原型实现的封装继承多态。分享给大家供大家参考，具体如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>www.jb51.net js基于原型prototype封装继承多态</title>
</head>
<body>
<script>
function Person(name,age)
{
this.name=name;
this.age=age;
}
Person.prototype.getName=function()
{
return this.name;
}
Person.prototype.setName=function(name)
{
this.name=name;
}
Person.prototype.getAge=function()
{
return this.age;
}
Person.prototype.setAge=function(age)
{
this.age=age;
}
//--------------------
function Student(name,age,c)
{
this.name=name;
this.age=age;
this.c=c;
}
Student.prototype=new Person(this.name,this.age);//重点
Student.prototype.getC=function()
{
return this.c;
}
Student.prototype.setC=function(c)
{
this.c=c;
}
var a=new Person("小小",19);
document.write(a.getName());
//-----------------------------------------
var b=new Student("大大",15,1);
document.write(b.getName());
</script>
</body>
</html>
运行结果：
小小大大