构造函数+原型

<script type="text/javascript">

function Car(color, doors, wheels) { //创建一个类

this.color = color; //类属性

this.doors = doors;

this.wheels = wheels;

this.run = function() { //类方法

alert("我会跑！！！");

}

}

Car.prototype.cc = "hahaha"; //通过proto属性存储一个cc=“hahaha”;

Car.prototype.stop = function() { //原型链

alert("我会停止！！！");

}

Car.prototype.stop2 = function() { //关注原型链接

alert("我还是会停！！！");

}

//创建一个实例对象；

var car1 = new Car("red", 4, 4);

alert(car1.cc);

car1.run();

car1.stop();

document.write("这个车的颜色是：" + car1.color + "<br/>");

document.write("这个车有" + car1.doors + "个门" + "<br/>");

document.write("这个车有" + car1.wheels + "轮子<br/><br/><br/>");

var car2 = new Car("blue", 4, 4);

document.write("这个车的颜色是：" + car2.color + ",有" + car2.doors + "个车门，有" + car2.wheels + "个轮子<br/>");

car2.stop2();

</script>