上下两个Select列表框交换数据的JS
日期：2014-05-16 浏览次数：20448 次
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> Select列表框交换数据</TITLE>
</HEAD>
<style>
center
{
font-size:12px;
color:red;
font-weight:bold;
}
select
{
font-size:12px;
color:green;
}
</style>
<BODY>
<span id='feedback'></span>
<form method="post" name="myform">
<table border="0" width="400">
<tr>
<td><CENTER>可选择排序方式</CENTER></td>
<td> </td>
<td><CENTER>已选择排序方式</CENTER></td>
</tr>
<tr>
<td width="40%">
<select multiple name="left" id="left" size="8" style='width:200;'
ondblclick="moveOption(document.getElementById('left'), document.getElementById('right'))">
<option value="20">ASP</option>
<option value="30">PHP</option>
<option value="40">ASP.NET</option>
<option value="50">JSP</option>
<option value="60">VB</option>
<option value="70">DELPHI</option>
<option value="80">AJAX</option>
<option value="90">JQUERY</option>
</select>
</td>
<td width="20%" align="center">
<input type="button" value=" >> " onclick="moveOption(document.getElementById('left'),document.getElementById('right'))"><br><br>
<input type="button" value=" << " onclick="moveOption(document.getElementById('right'), document.getElementById('left'))">
</td>
<td width="40%">
<select multiple name="right" id="right" size="8" style='width:200;'
ondblclick="moveOption(document.getElementById('right'), document.getElementById('left'))">
</select>
</td>
</tr>
<tr>
<td colspan="3">
<CENTER>
<INPUT TYPE="button" value="置顶" onclick="moveTop(document.getElementById('right'));">
<INPUT TYPE="button" value="上移" onclick="moveUp(document.getElementById('right'));">
<INPUT TYPE="button" value="下移" onclick="moveDown(document.getElementById('right'));">
<INPUT TYPE="button" value="置底" onclick="moveBottom(document.getElementById('right'));">
</CENTER></td>
</tr>
</table>
</BODY>
</HTML>
<SCRIPT LANGUAGE="JavaScript">
<!--
//上移
function moveUp(obj)
{
for(var i=1; i < obj.length; i++)
{//最上面的一个不需要移动，所以直接从i=1开始
if(obj.options[i].selected)
{
if(!obj.options.item(i-1).selected)
{
var selText = obj
