asp.net ajax 类型系统demo

<mce:script language=javascript><!--

//注册命名空间
Type.registerNamespace("Demo");
Demo.Message=function(content,publishTime)
{
this._content = content;
this._publishTime = publishTime;
}

Demo.Message.prototype=
{
get_content: function()
{
return this._content;
},

get_publishTime: function()
{
return this._publishTime.format("yyyy-MM-dd HH:mm:ss");
},

toString: function()
{
return this.get_content() + " " + this.get_publishTime();
}
}

//注册类
Demo.Message.registerClass("Demo.Message");

Demo.IContent=function()
{

}

Demo.IContent.prototype
{
showContent:function()
{}
}

//注册接口
Demo.IContent.registerInterface("Demo.IContent");

Demo.MessageWithUserId = function(userId, content, publishTime)
{
Demo.MessageWithUserId.initializeBase(this, [content, publishTime]);

this._userId = userId;
}

// 定义Demo命名空间下的MessageWithUserId类的方法
Demo.MessageWithUserId.prototype =
{
get_userId: function()
{
return this._userId;
},

showContent: function()
{
return Demo.MessageWithUserId.callBaseMethod(this, 'get_content')
},

// callBaseMethod用于调用基类的方法
toString: function()
{
return this.get_userId() + " " + Demo.MessageWithUserId.callBaseMethod(this, 'toString');
}
}
// 注册一个继承自Demo.Message类和Demo.IContent接口的类
Demo.MessageWithUserId.registerClass('Demo.MessageWithUserId', Demo.Message, Demo.IContent);

function Test()
{
var d=new Date();
var msgWithId=new Demo.MessageWithUserId(1,"你个大傻",d);
alert( Demo.IContent.isImplementedBy(msgWithId));
alert(msgWithId.toString());
alert(msgWithId.showContent());
}

// --></mce:script>