loginerror.jsp

jsp注册

<%@ page   contentType="text/html;   charset=GBK"%>   
<%@  page   import="java.sql.*"%>
<%      
      String id= (String)session.getAttribute("id");
	  String mm=  (String)session.getAttribute("password");
	  if(id.length()==0||mm.length()==0){
%> <script language="JavaScript">
             alert("请输入用户名，密码");
           </script>
           <%session.invalidate(); %>
           <meta   HTTP-EQUIV=REFRESH   CONTENT="0;URL=/xunibuluo/index.jsp">
<%}else{%> <script language="JavaScript">
             alert("出错!您的信息有错误");
           </script>
           <%session.invalidate(); %>
           <meta   HTTP-EQUIV=REFRESH   CONTENT="0;URL=/xunibuluo/index.jsp">
<%}%>