将一个Textarea 中选中的文本移动到另一个Textarea文本框中去

怎样利用button 实现将一个Textarea 中选中的文本移动到另一个Textarea文本框中去啊，谢谢各位了，我都郁闷一天了

解决方案 »

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在按钮的操作事件内进行如下操作：
1、String text=Textarea1.getSelectedText()
  得到Textarea1表示的文本中选定的文本

2、追加到另一个Textarea2
Textarea2.append(String str)
<html>
<head>
    <title></title>
</head>
<body>
<textarea id="test1" ></textarea>
<textarea id="test2"></textarea>
<input type=button value=transfer onclick="do_trans()">
<script>
     function do_trans() {
            var selecter = document.selection.createRange();
            var s = selecter.text;
            document.getElementById("test2").value=s;
    }

</script>
</body>
</html>
不过，楼主的问题应该是问java 知识吧
我复制过去的值为什么是“undefined”啊！
这是我界面的代码
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@  page  import="java.io.*"%>
  <%@  page  import="java.util.*"%>
  <%@  page  import="java.sql.*"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">

    <title>My JSP 'find.jsp' starting page</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">

  </head>
   <script>
  function check(){
    if(form.ip.value==""){
       alert("IP地址不能为空！");
       document.form.ip.focus();
       return false;
    }
    else if(form.userName.value==""){
       alert("用户名不能为空！");
       document.form.userName.focus();
       return false;
    }
    else if(form.loginPassword.value==""){
       alert("登录口令不能为空！");
       document.form.loginPassword.focus();
       return false;
    }
    else if(form.shareName.value==""){
       alert("共享名不能为空！");
       document.form.shareName.focus();
       return false;
    }
  }
  </script>
  <script>
  function getTxtValue (){
var selecter= document.selection.createRange().text;
   var s = selecter.text;
       document.getElementById("txt2").value=s;
  }
  </script>
   <font color="red" size="2">${msg}</font>
  <hr color=#0066FF size=1 align=left width=60%>
  <body>

  <%
     request.setCharacterEncoding("utf-8");
   response.setCharacterEncoding("utf-8");
  int ids = Integer.parseInt(request.getParameter("id"));
  Connection  con  =  null;
  Statement  stmt  =  null;
  ResultSet  rs  =  null;
  try{
  Class.forName("com.mysql.jdbc.Driver");
  String  dbUrl  =  "jdbc:mysql://localhost:3306/TbWebMin";
  String  dbUser  =  "root";
  String  dbPwd  =  "123456";
  con  =  java.sql.DriverManager.getConnection(dbUrl,dbUser,dbPwd);
  stmt  =  con.createStatement();
  String sql = "select * from configuration_services where id="+ids+"";
  rs  =  stmt.executeQuery(sql);
  //输出查询结果
  out.println(" <table  border=0  width=700>");
  if  (rs.next()){
  String id = rs.getString("id");
  String ip = rs.getString("ip");
  String userName = rs.getString("userName");
  String loginPassword = rs.getString("loginPassword");
  String shareName = rs.getString("shareName");
  //打印所显示的数据
   // out.println(" <form action=tosave.jsp?id="+id+" method=post>");
   out.println("<input type=hidden name=id  value="+id+">");
  out.println("<tr>");
  out.println("<td align=right>IP：</td>");
  out.println("<td>");
  out.println("<input type=text name=ip size=20 value="+ip+">");
  out.println("</td>");
  out.println("</tr>");  out.println("<tr>");
  out.println("<td align=right>用户名：</td>");
  out.println("<td>");
  out.println("<input type=text name=userName size=20 value="+userName+">");
  out.println("</td>");
  out.println("</tr>");  out.println("<tr>");
  out.println("<td align=right>登录口令：</td>");
  out.println("<td>");
  out.println("<input type=text name=loginPassword size=20 value="+loginPassword+">");
  out.println("</td>");
  out.println("</tr>");  out.println("<tr>");
  out.println("<td align=right>共享名：</td>");
  out.println("<td>");
  out.println("<input type=text name=shareName size=20 value="+shareName+">");
  out.println("</td>");
  out.println("</tr>");
  }
  out.println(" </table>");
  out.println(" <table  border=0  width=700>");
  out.println("<tr>");
  out.println("<td align=right>");
  out.println("制定访问者：");
  out.println("</td>");
  out.println("<td>");
  out.println("<textarea  cols=16 rows=6 readonly id=txt1>");
String sq = "select account from tb_user";
  rs = stmt.executeQuery(sq);
  while(rs.next()){
     String accounts = rs.getString("account");
out.println(""+accounts+"");
  }
  out.println("</textarea>");
  out.println("</td>");
  out.println("<td>");
  out.println("<input type=submit name=add value='>>' onclick=getTxtValue()>");
  out.println("<br>");
  out.println("<input type=submit name=rm  value='<<'>");
  out.println("</td>");
  out.println("<td>");
  out.println("<textarea readonly cols=16 rows=6 id=txt2>");
  out.println("</textarea>");
  out.println("</td>");
  out.println("</tr>");

  out.println("<tr>");
  out.println("<td></td>");
  out.println("<td>");
  out.println("   ");
  out.println("<input type=submit name=Submit  value=确认修改>");
  out.println("</td>");
  out.println("</tr>");
out.println(" </table>");
//    out.println("</form>");
  }catch  (Exception  e)  {
  out.println(e.getMessage());
  }finally{
  //关闭数据库连结
  try{
  if(rs  !=  null){
  rs.close();
  }
  }catch(SQLException  e){
  }

  try{
  if(stmt  !=  null){
  stmt.close();
  }
  }catch(SQLException  e){
  }

  try{
  if(con  !=  null){
  con.close();
  }
  }catch(SQLException  e){
  }
  }
  %>

  </body>
</html>