JavaScript 继承实例之一
<script type="text/javascript">
function Animal(name){
this.name=name;
}
Animal.prototype.sayName=function(){
alert("My name is:"+this.name);
}
Animal.prototype.sayHi=function(){
alert("Hi! from animal:"+this.name);
}
function Tiger(name){
Animal.call(this, name);//call(obj,args...)它的第一个参数用作 this 的对象。其他参数都直接传递给函数自身。
}
Tiger.prototype=new Animal();//
Tiger.prototype.sayHi=function(){
alert("Hi! from tiger:"+this.name);
}
var a1=new Animal("a1");
var a2=new Tiger("a2");
a1.sayName();
a1.sayHi();
alert(a1 instanceof Animal);//true
alert(a1 instanceof Tiger);//false
a2.sayName();
a2.sayHi();
alert(a2 instanceof Animal);//true
alert(a2 instanceof Tiger);//true
</script>