1 <html> 2 <head> 3 <title>js的原型对象和constructor研究</title> 4 <head/> 5 <body> 6 7 <script > 8 /** 9 *javascript原型对象是一种特殊的实例，它提供一种在所有的实例中共享状态的机制 10 *当访问对象成员时,先在当前对象中查找,,如果没有找到,则到该对象的原型对象中进行查找,,,一直到Object 11 */ 12 13 //为Object的原型对象添加属性 14 Object.prototype.sex = "male"; 15 16 function Base(){ 17 this.name = "eric"; 18 } 19 20 Base.prototype = { 21 constructor:Base, //把原型对象的constructor指向Base 22 name:"prototype..", 23 greet: function(){ alert("hello...i'm " + this.name + "and i m " + this.sex)} //此处的sex继承自Object 24 } 25 26 var a = Base.prototype; 27 a.greet(); //prototype 28 var obj = new a.constructor; //用原型对象的构造方法创建对象 29 alert(obj.name); //eric 30 var b = new Base(); 31 b.greet(); // eric 32 33 </script> 34 </body> 35 </html>