JavaScript 动态添加类属性与方法实现

function MyClass() 
{  
  //This function is same as a constructer  
  alert("New Object Created");  
} 
//Creating Object  
var MyObject = new MyClass ();  
NewObject.prototype =  
{  
  //Adding Method named "MyMethod"  
  MyMethod: function(){alert("My Method");} ,  
  
  //Adding property named "MyProperty"  
  MyProperty: "My Property"  
} 
 
//Calling Method  
MyObject.MyMethod();  
 
//Assigning Property  
MyObject.MyProperty = "My Property Value changed";