html页面代码例如以下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<style type="text/css">
* { margin:0; padding:0; }
div.centent {
float:left;
text-align: center;
margin: 10px;
}
span {
display:block;
margin:2px 2px;
padding:4px 10px;
background:#898989;
cursor:pointer;
font-size:12px;
color:white;
}
</style>
<!-- 引入jQuery -->
<script src="../jquery/jquery-1.3.1.js" type="text/javascript"></script>
<script type="text/javascript">
$(function(){
//移到右边
$('#add').click(function() {
//获取选中的选项，删除并追加给对方
$('#select1 option:selected').appendTo('#select2');