flash(as3.0)在线聊天室

package {
	import flash.display.*;
	import flash.net.*;
	import flash.events.*;
	import flash.utils.*;
	import flash.text.*;
	public class CChat extends MovieClip {
		var str_user:String = "未知";
		/////////////////////////////////////
		var sendUrl:String = "send.php";
		var recvUrl:String = "recv.php";
		var timer:Timer;
		public function CChat() {
			this.send_btn.addEventListener(MouseEvent.CLICK,sendMessage);

			timer = new Timer(5000,0);
			timer.addEventListener(TimerEvent.TIMER,timerHandler);
			timer.start();
			loadMessages();
		}
		public function setUserName(str:String):void {
			str_user = str;
		}
		private function timerHandler(e:TimerEvent):void {
			loadMessages();
		}

		public function setPosition(X:int,Y:int):void {
			this.x = X;
			this.y = Y;
		}

		private function loadMessages():void {
			var randomTxt:String= "?rand="+Math.random();
			var urlRequest:URLRequest = new URLRequest(recvUrl+randomTxt);
			var urlLoader:URLLoader = new URLLoader();
			urlLoader.addEventListener(Event.COMPLETE,loadMessagesHandler);
			urlLoader.load(urlRequest);
		}
		private function loadMessagesHandler(e:Event):void {
			var loader:URLLoader = URLLoader(e.target);
			var xml:XML = new XML(loader.data);
			//清空数据
			chat_list.htmlText = "";

			for each (var item in xml..data) {
				addMessage(item.name,item.message);
			}
		}
		private function addMessage(user:String,msg:String):void {
			chat_list.htmlText += user + ": " + msg + "n";
		}
		private function sendMessageHandler(e:Event):void {
			input_txt.text = "";
			trace("发送成功.");
		}
		private function sendMessage(e:MouseEvent):void {
			var variables:URLVariables = new URLVariables();
			variables.user = str_user;
			variables.msg = input_txt.text;


			var urlRequest:URLRequest = new URLRequest(sendUrl);
			urlRequest.method = URLRequestMethod.POST;
			urlRequest.data = variables;

			var urlLoader:URLLoader = new URLLoader();
			urlLoader.addEventListener(Event.COMPLETE,sendMessageHandler);
			urlLoader.load(urlRequest);

			addMessage(str_user,input_txt.text);

		}
	}
}

界面如下:

创建一个.fla文件,，添加关键帧入上图，帧代码如下：

stop();
enter_btn.addEventListener(MouseEvent.CLICK,enterHandler);
function enterHandler(e:MouseEvent):void {
	if (enter_txt.text!="") {
		enter_btn.removeEventListener(MouseEvent.CLICK,enterHandler);
		removeChild(enter_btn);
		removeChild(enter_txt);
		var chat:MovieClip = new CChat();
		chat.setUserName(enter_txt.text);
		addChild(chat);
	}
}

创建影片剪辑元件，绑定CChat 类，界面如下：

?

数据库表如下：