两个select多选控件中项的移动的相关操作

视觉效果：

代码：

Code
<html>
<head>
    <title></title>
    <script language="javascript">
        function Add(objA,objB)
        {
            var tem=new Array();
            with(objA)
            for(i=length-1;i>=0;i--)
                if(options[i].selected){tem[tem.length]=new Option(options[i].text,options[i].value);}

            if(objA.selectedIndex>-1)
            {
                for(i=0;i<objB.length;i++) tem[tem.length]=objB.options[i];
                with(objB)
                {
                    length=0;
                    tem.sort(sortArr);
                    for(i=0;i<tem.length;i++) options[length]=new Option(tem[i].text,tem[i].value)
                }
            }
        }
        function sortArr(a,b)
        {
            if(a.text>b.text)return 1;
            if(a.text<b.text)return -1;
            return 0;
        }
        //
        function up(obj)
        {
            var objO = new Option(obj.options[obj.selectedIndex].text,obj.options[obj.selectedIndex].value);

            var selectedIndex = obj.selectedIndex;
            if(selectedIndex>0)
            {
                obj.options[selectedIndex].text = obj.options[selectedIndex-1].text;
                obj.options[selectedIndex].value = obj.options[selectedIndex-1].value;

                obj.options[selectedIndex-1].text = objO.text;
                obj.options[selectedIndex-1].value = objO.value;

                obj.selectedIndex = selectedIndex-1;
            }
        }
        //
        function down(obj)
        {
            var objO = new Option(obj.options[obj.selectedIndex].text,obj.options[obj.selectedIndex].value);

            var selectedIndex = obj.selectedIndex;
            if(selectedIndex<obj.options.length-1)
            {
                obj.options[selectedIndex].text = obj.options[selectedIndex+1].text;
                obj.options[selectedIndex].value = obj.options[selectedIndex+1].value;

                obj.options[selectedIndex+1].text = objO.text;
                obj.options[selectedIndex+1].value = objO.value;

                obj.selectedIndex = selectedIndex+1;
            }
        }
        // 双击时添加到b
        function dba(objA,objB)
        {
            var objO=new Option(objA.options[objA.selectedIndex].text,objA.options[objA.selectedIndex].value)
            objB.add(objO);
        }
        //
        // 双击时删除b
        function dbb(obj)
        {
            obj.removeChild(obj.options[obj.selectedIndex]);
        }
        // 删除b中选中的项
        function del(obj)
        {
            for(var i=obj.options.length-1;i>=0;i--)
            {
                if(obj.options[i].selected)
                {
                    obj.removeChild(obj.options[i]);
                }
            }
        }
        //
        function getvalue(obj)
        {
            var str="";

            for(var i=0;i<obj.options.length;i++)
            {
                if(str.length>0)
                    str = str + "," + obj.options[i].value;
                else
                    str = obj.options[i].value;
            }

            document.getElementById("selectValue").innerText = str;
        }
        //
    </script>

</head>
<body bgcolor="#CCCCCC">
    <table cellspacing="0" cellpadding="0" width="448" border="0">
        <tr>
            <td width="45%" align="center">
                <select style="width: 155px" multiple size="15" name="a" ondblclick="dba(this,document.getElementById('b'))">
                    <option value="av1" title="av1">at1</option>
                    <option value="av2" title="av2" style="background-color:#999999">at2</option>
                    <option value="av3" title="av3">at3</option>
                    <option value="av4" title="av4">at4</option>
                    <option value="av5" title="av5">at5</option>
                    <option value="av6" title="av6">at6</option>
                    <option value="av7" title="av7">at7</option>
                </select>
            </td>
            <td>
                <input onClick="Add(document.getElementById('a'),document.getElementById('b'))" type="button"
                    value=">>" style="width: 40px">
                <br>
                <input onClick="del(document.getElementById('b'))" type="button" value="Del" style="width: 40px">
                <br>
                <input onClick="up(document.getElementById('b'))" type="button" value="b↑" style="width: 40px">
                <br>
                <input onClick="down(document.getElementById('b'))" type="button" value="b↓" style="width: 40px">
            </td>
            <td width="45%" align="center">
                <select style="width: 155px" multiple size="15" name="b" ondblclick="dbb(this)">
                    <option value="bv1">bt1</option>
                    <option value="bv2">bt2</option>
                    <option value="bv3">bt3</option>
                    <option value="bv4">bt4</option>
                    <option value="bv5">bt5</option>
                    <option value="bv6">bt6</option>
                    <option value="bv7">bt7</option>
                    <option value="bv8">bt8</option>
                </select>
            </td>
        </tr>
        <tr>
            <td colspan="3" align="center">
                <input type="button" name="button1" value="获得右边select值" onClick="getvalue(document.getElementById('b'))"></td>
        </tr>
        <tr>
            <td colspan="3" align="center">
                <div id="selectValue">
                </div>
            </td>
        </tr>
    </table>
</body>
</html>

转载于:https://www.cnblogs.com/jianlinglo/archive/2009/01/12/1374445.html

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