<script type="text/javascript">

/**

* 9.2.2 counstructor属性

*/

(function(){

function Fun(){

this.sname ="wq";

};

// 这里的构造函数都是重写的，如果没重写他将会继承Object的原型，

Fun.prototype = {

constructor: Fun,

say: function(){},

fill: function(){},

}

var fun = new Fun();

// console.log(fun, "fun");

})();

//关于bind方法的理解： es5中bind方法返回的函数是没有prototype属性的, (我们自己写的是有的)

(function(){

// function fun(sname){

// this.sname=sname;

// return this;

// };

// var obj ={

// sname:"wqwqwqw",

// sage:"12",

// };

// var f = fun.bind(obj);

// console.log(f,"F");

// console.log(new f(),"ff");

})();

(function(){

var obj = {"sname":"wq"};

function fun(sname){

this.sname = sname

}

fun.prototype = {

say:function(){}

}

var Bind = fun.bind(obj);

// console.log(Bind.prototype,"Bind");

// console.log(new Bind("wangqi"),"Bind")

})();

(function(){

function fun(){};

fun.prototype ={

say:function(){}

}

var f = new fun();

var p;

console.log(fun.prototype.isPrototypeOf(f));

})();

</script>