对聊天室外观和功能进行大改，添加使用表情包功能

WebRoot/chartroom/login.jsp

@@ -1,8 +1,8 @@
-<%@ page contentType="text/html;charset=gb2312" language="java"%>
+<%@ page contentType="text/html;charset=utf-8" language="java"%>
 <%@ page import="java.util.Vector"%>
 <%@ page import="com.wgh.UserForm"%>
 <%
-	request.setCharacterEncoding("gb2312");
+	request.setCharacterEncoding("utf-8");
 	Object username = session.getAttribute("actualuser");
 	boolean flag = true;
 	Vector temp = (Vector) application.getAttribute("myuser");
@@ -11,7 +11,7 @@
 	}
 	UserForm mylist = new UserForm();
 	mylist.username = (String) username;
-	//±£´æµ±Ç°µÇ¼µÄÓû§Ãû
+	//保存当前登录的用户名
 
 	Vector myuser = (Vector) application.getAttribute("myuser");
 	if (myuser == null) {