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<SCRIPT LANGUAGE="JavaScript">
var tt = "";
   var flag = false;
   var radios = document.getElementsByName("t1");//´ÓjspÖÐÈ¡radioµÄid»òradioµÄname
   for(var i=0;i<radios.length;i++){
   //Èç¹ûµ±Ç°ÓÐÑ¡ÖÐ
   if(radios[i].checked == true){
   //¸³Öµ
   tt = radios[i].value;
   //¸³Öµ
   flag = true;
   //½áÊøÑ­»·
   break;
   }
   }
   //ÅÐ¶Ï radio ÊÇ·ñÓÐÑ¡ÖÐ
   if(!flag){
   alert("No choose");
   return;
   }else{
   alert(tt);
   }
</SCRIPT>


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import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
/**
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<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@ page import="java.sql.*"%>
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