原型属性问题javascript

我在尝试运行时遇到了问题。我正在尝试使用观察者模式。我不能在select change事件上运行一个仲裁函数。我不断收到错误“Publisher.protoype”为空或不是对象。我究竟做错了什么？原型属性问题javascript

 function Publisher(){ 
      this.subscribers = []; 
     } 

     Publisher.protoype.deliver = function(data){ 
      this.subscribers.forEach(
       function(fn){ 
        fn(data); 
       } 
      ); 
      return this; 
     } 

     Function.prototype.subscribe = function(publisher){ 
      var that = this; 
      var AlreadyExists = publisher.subscribers.some(
       function(el){ 
        if (el == that){ 
         return; 
        } 
       } 
      ); 
      if(!AlreadyExists){ 
       publisher.subscribers.push(this); 
      } 
      return this; 
     } 

     Function.prototype.unsubscribe = function(publisher){ 
      var that = this; 
      publisher.subscribers = publisher.subscribers.filter(
       function(el){ 
        if(el != that){ 
         return el; 
        } 
       } 
      ); 
      return this; 
     } 
     var EventPublisher = new Publisher();  
     var SelectChange = function(data){alert("hello")}; 
     SelectChange.subscribe(EventPublisher); 
     function onSelectChange(oSelect){ 
      EventPublisher.deliver(oSelect); 
     } 

    </script> 

</head> 

<body> 
    <form name="Tester" action="Tester" method="post" enctype="application/x-www-form-urlencoded"> 
     <select name="selecter" onchange="Javascript:onSelectChange(this)"> 
      <option name="Shane" value="Shane"> 
       Shane 
      </option> 

      <option name="Shane2" value="Shane2"> 
       Shane2 
      </option> 
     </select><input type="submit"><input type="reset"> 
    </form> 
</body> 
</html>

来源

2010-12-08 Shane

你有一个错字：Publisher.protoype.deliver缺少一个 'T'。

来源

2010-12-08 10:59:24

那么这值得一脸巴掌！：P感谢！ – Shane 2010-12-08 11:01:38

Publisher.protoype绝对为空或不是对象。也许你打算输入Publisher.prototype。

来源

2010-12-08 11:00:05

原型属性问题javascript

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