弟兄们,,JSP问题,,好急呀!!~~~

<%@ page contentType="text/html;charset=gb2312" import="sjk.DBSQL,java.sql.*"%>
<%response.setHeader("Pragma","No-cache"); response.setDateHeader("Expires",0); response.setHeader("Cache-control","no-cache"); %>
<%!
public String chanstr(String str){
      String temp_p=str, temp=null;
try{
       byte[] temp_c=temp_p.getBytes("ISO8859-1");
       temp=new String(temp_c);
}
       catch(Exception ex)
{
}
      return temp;
}
%>
<%
String zhibiao=chanstr(request.getParameter("zhibiao"));
DBSQL db=new DBSQL();
   db.openDB();
   String strSQL;
   strSQL="select Indicator_id,Indicator_name_cn from indicator where Indicator_Name_cn='" + zhibiao +"'";
  try {
      ResultSet sqlRst = db.executeQuery(strSQL);
      String ttt="";
      if (sqlRst.next()) {
          ttt=sqlRst.getString("Indicator_Name_cn");
         if (ttt!=null){
%>
           <script language=javascript>
                   alert(ttt);
                   location.href="index.jsp";
           </script><%}%>
<%}else{%>
          <script language=javascript>
                  alert('没有这个指标');
                  location.href="index.jsp";
         </script><%}
     sqlRst.close();
  } catch (SQLException ex) {
      System.err.println("aq.executeQuery: " + ex.getMessage());
   }
   db.closeDB();
%>

运行时,总是提示alter(ttt)中的ttt没有定义,是不是JSP中定义的ttt不能在JAVASCRIPT中用呀!!!???
该怎么写才能对呀,,,
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这个是肯定的撒
我不会JSP但是我知道在ASP里

是这样做的
msgBox(<% = str %>)

你试试啊！
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在JAVASCRIPT里面怎么能写JSP代码呢?乱弹琴!你写的太罗嗦了!
怎么可以在JSP里面写那么多代码呢?验证可以写在JAVABEAN或SERVLET里面啊,写个函数是BOOLEAN类型的,然后在JSP页面里判断是TRUE还是FALSE不就行了吗?如果是TRUE就说明数据库里面有这条记录?笨...........................................................................
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朋友，把javascript 代码从jsp代码中拿出来。单独写
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感谢回复,我是新手.以后请多指教~~!
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