1 function Human(name, sex) {
 2             this.name = name;
 3             this.sex = sex;
 4             this.getWife=function(){//娶老婆
 5                 if (this.sex == "男") {
 6                     return "我要娶老婆";
 7                 }             
 8                 else
 9                     return "我不用娶老婆";  
10             }
11         }
12         Human.prototype.say = function () {
13             alert(this.name);
14         }
15         var man = new Human("吕布", "男");
16         var woman = new Human("貂蝉", "女");
17         alert(man.getWife());//我要娶老婆
18         alert(woman.getWife());//我不用娶老婆
19         alert(man.getWife == woman.getWife);//false
20         alert(man.say==woman.say);//true