<%@   page   contentType="text/html;   charset=GBK"%>   
  <%@   page   import="java.sql.*"%>   
 <jsp:useBean id="db" class="data.DBConnectionBean"/>
   <%      
    request.setCharacterEncoding("gb2312");
    String name= (String)session.getAttribute("name");
     if (name==null||name.length()==0){
          %>
           <script language="JavaScript">
             alert("呢稱不能為空");
           </script>
           <%
      }else{
      try{
      if (db.checkname(name))
      {
           %>
           <script language="JavaScript">
             alert("已存在的昵稱");
           </script>
           <%
      }else 
         {
           %>
           <script language="JavaScript">
             alert("可以使用的昵稱");
           </script>
           <%
          }
      }catch(SQLException e){System.out.println(e.getMessage());}}
     %>
     <%session.invalidate(); %>
   <meta   HTTP-EQUIV=REFRESH   CONTENT="0;URL=/xunibuluo/regedit.jsp">