<!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='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='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.options[i].text;
var selValue = obj.options[i].value;
obj.options[i].text = obj.options[i-1].text;
obj.options[i].value = obj.options[i-1].value;
obj.options[i].selected = false;
obj.options[i-1].text = selText;
obj.options[i-1].value = selValue;
obj.options[i-1].selected=true;
}
}
}
}
//下移
function moveDown(obj)
{
for(var i = obj.length -2 ; i >= 0; i--)
{//向下移动，最后一个不需要处理，所以直接从倒数第二个开始
if(obj.options[i].selected)
{
if(!obj.options[i+1].selected)
{
var selText = obj.options[i].text;
var selValue = obj.options[i].value;
obj.options[i].text = obj.options[i+1].text;
obj.options[i].value = obj.options[i+1].value;
obj.options[i].selected = false;
obj.options[i+1].text = selText;
obj.options[i+1].value = selValue;
obj.options[i+1].selected=true;
}
}
}
}
//移动
function moveOption(obj1, obj2)
{
for(var i = obj1.options.length - 1 ; i >= 0 ; i--)
{
if(obj1.options[i].selected)
{
var opt = new Option(obj1.options[i].text,obj1.options[i].value);
opt.selected = true;
obj2.options.add(opt);
obj1.remove(i);
}
}
}
//置顶
function moveTop(obj)
{
var opts = [];
for(var i =obj.options.length -1 ; i >= 0; i--)
{
if(obj.options[i].selected)
{
opts.push(obj.options[i]);
obj.remove(i);
}
}
var index = 0 ;
for(var t = opts.length-1 ; t>=0 ; t--)
{
var opt = new Option(opts[t].text,opts[t].value);
opt.selected = true;
obj.options.add(opt, index++);
}
}
//置底
function moveBottom(obj)
{
var opts = [];
for(var i =obj.options.length -1 ; i >= 0; i--)
{
if(obj.options[i].selected)
{
opts.push(obj.options[i]);
obj.remove(i);
}
}
for(var t = opts.length-1 ; t>=0 ; t--)
{
var opt = new Option(opts[t].text,opts[t].value);
opt.selected = true;
obj.options.add(opt);
}
}
//-->
</SCRIPT>