站长手册

答：　　function Cat(name,color){

this.name = name;

this.color = color;

}

Cat.prototype.type = "猫科动物";

Cat.prototype.eat = function(){alert("吃老鼠")};

var cat1 = new Cat("大毛","黄色");

var cat2 = new Cat("二毛","黑色");