JavaScript 面向对象继承的实现

 <script type="text/javascript">
  function Animal () {
      this.species="Animal";
  }
 function Cat(name,color){
     this.name=name;
     this.color=color;
 }
 //Apply 将父类对象的构造函数赋值到子类上，Animal.apply(this,arguments);
  function Cat(name,color){
      this.name=name;
      this.color=color;
      Animal.apply(this,arguments);
  }
  var cat1=new Cat("大毛","黄色");
  alert(cat1.species);

 //Prototype 子对象原型prototype赋值父类对象，并将子类对象原型的构造函数赋值为子类
 Cat.prototype = new Animal();
 Cat.prototype.constructor=Cat;
 var cat1=new Cat("大毛","黄色");
 alert(cat1.species);
 </script>