<p>
    <input type="button" name="btnShow" id="btnShow" value="向下展開">
    <input type="button" name="btnHide" id="btnHide" value="向上收起">
    <input type="button" name="btnToggle" id="btnToggle" value="切換">
</p>
<p>&nbsp;</p>
<div id="box">box</div>
        body {
            font-family: '微軟正黑體'; font-size: 11pt;
        }
        div {
            float: left; height: 150px; border: 1px solid #000;
        } 
#box {
            height: 100px; width: 100px;
            background-color: #FF9;
        }
       //展開/收起 
        $(document).ready(function(){
            $('#btnShow').click(function (){
                $('#box').slideDown(500);
            });
            $('#btnHide').click(function () {
                $('#box').slideUp(500);
            });
            $('#btnToggle').click(function () {
                $('#box').slideToggle(500);
            });
        });

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js