Javascript 创建类并动态添加属性及方法

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";