编译不通过，请大家帮我看下

<%@page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<html>
<head>
<title>reply</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<jsp:useBean id="jezz_mj_reply" scope="page" class="wm.bean.DB" />
<body>
<%
  String login = (String)session.getAttribute("login");
  String error="";
  String id=request.getParameter("id");
  /*String sql="select content from liuyan_temp where id="+id;
   ResultSet rs=jezz_mj_reply.executeQuery(sql);
   rs.next();
   String content=rs.getString("content");*/
  //String httpfile="";
  //httpfile=request.getHeader("REFERER");
   if(login==null)
   error+="非法操作";
   if(id=="")
   error+="非法回复";
   if(error.equals(""))
   {

   String sql="select content from liuyan_temp where id="+id;
   ResultSet rs=jezz_mj_reply.executeQuery(sql);
   rs.next();
   String content=rs.getString("content");
           


    }
else
{
out.print(error);
//response.sendRedirect("index.jsp");
}
%><form action="reply" method="post" name="rform">
<table width="500" border="0" align="center">
  <tr>
    <td align="center">回复留言</td>
  </tr>
  <tr>
    <td align="center"><textarea name="content" cols="60" rows="10"><%=content%> </textarea>&nbsp;</td>
  </tr>
  <tr>
    <td align="center"><textarea name="content_reply" cols="60" rows="10"></textarea></td>
  </tr>
  <tr>
    <td align="center"><input name="sumit" type="submit" value="提交"></td>
  </tr>
</table>
</form>
<%
 //rs.close();
 jezz_mj_reply.all_close();
%>
</body>
</html>
出错是这个地方<%=content%>，提示是这样的content cannot be resolved
不知道我的哪个地方出错了