JavaScript继承之闭包原型继承法

function Dog()
{
    this.name = "普通的狗";
    this.wow = function()
    {
        alert(this.name + " is wowing!!");
    }
    this.sleep = function()
    {
        alert(this.name + " is sleep");
    }
}

function FlyingDog()
{
    this.name = "会飞的狗";
    this.wow = function()
    {
        alert(this.name + " is flying and wowing");
    }
}
FlyingDog.prototype = new Dog();
flyingdog = new FlyingDog();
flyingdog.wow();
flyingdog.sleep();