JavaScript一个继承类的例子

function Animal(name)
{
this.name = name || "xxx";
this.type = "animal";
}

Animal.prototype = {
say : function(){
alert("I'm a " + this.type + ", my name is " + this.name)
}
}

function Bird(name)
{
Animal.call(this, name);
}

Bird.prototype={
}

var myBird = new Bird("xiaocui");
alert(myBird.type);