下拉框选中

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style type="text/css">
        .centent{
            display: inline-block;
        }
        span{
            display: block;
        }
    </style>
</head>
<body>
<div class="centent">
    <select id="select1" multiple="multiple" style=" 100px; height: 160px;">
        <option value="1">选项1</option>
        <option value="2">选项2</option>
        <option value="3">选项3</option>
        <option value="4">选项4</option>
        <option value="5">选项5</option>
        <option value="6">选项6</option>
        <option value="7">选项7</option>
    </select>
    <div>
        <span id="add">选中添加到右边&gt;&gt;</span>
        <span id="addall">全部添加到右边&gt;&gt;</span>
    </div>    
</div>
<div class="centent">
    <select multiple="multiple" id="select2" style=" 100px; height: 160px;"></select>
    <div>
        <span id="remove">&lt;&lt;选中删除到左边</span>
        <span id="removeall">&lt;&lt;全部删除到左边</span>
    </div>
</div>
    
</body>
<script type="text/javascript" src="js/jquery-1.7.2.min.js"></script>
<script type="text/javascript">
    $(function(){
        $('#add').click(function(){
            var $options=$('#select1 option:selected');
            $options.appendTo('#select2');
        });
        $('#addall').click(function(){
            var $options=$('#select1 option');
            $options.appendTo('#select2');
        });
        $('#select1').dblclick(function(){
            var $options=$('option:selected',this);
            $options.appendTo('#select2');
        });
        $('#remove').click(function(){
            var $options=$('#select2 option:selected');
            $options.appendTo('#select1');
        });
        $('#removeall').click(function(){
            var $options=$('#select2 option');
            $options.appendTo('#select1');
        });
        $('#select2').dblclick(function(){
            var $options=$('option:selected',this);
            $options.appendTo('#select1');
        });
        
    })
</script>
</html>
原文地址:https://www.cnblogs.com/jinsuo/p/7424972.html