Select multiple多选上移、下移

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">

<HTML>

<HEAD>

<meta http-equiv="content-type" content="text/html; charset=utf-8"/>

<TITLE> Select Demo </TITLE>

<META NAME="Generator" CONTENT="EditPlus">

<META NAME="Author" CONTENT="">

<META NAME="Keywords" CONTENT="">

<META NAME="Description" CONTENT="">

</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">测试数据一</option>

       <option value="30">测试数据二</option>

       <option value="40">测试数据三</option>

       <option value="50">测试数据四</option>

       <option value="60">测试数据五</option>

       <option value="70">测试数据六</option>

       <option value="80">测试数据七</option>

       <option value="90">测试数据八</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="dropOption(document.getElementById('right'))">

   </td>

      <td width="40%">

  <select  multiple name="right" id="right" size="8" style='width:200;'

  ondblclick="dropOption(document.getElementById('right'))">

  </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.options.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.options.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 (obj2.options.length > 0){

                var exsits = false;

                for (var j = 0; j < obj2.options.length; j ++ ){

                    if (obj2.options[j].value == obj1.options[i].value){

                        exsits = true;

                        break;

                    }

                }

                if(exsits){

                    continue;

                }

            }

            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);

            }

        }

    }

    //删除

    function dropOption(obj){

        for(var i = obj.options.length - 1 ; i >= 0 ; i--){

            if(obj.options[i].selected){

                obj.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>
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Select multiple多选上移、下移

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