jquery上下滚动图片

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>jQuery 图片上下滚动</title>
    <style>
        #scrollDiv {
            width: 300px;
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        #scrollDiv img {
            width: 100%;
            height: auto;
            position: absolute;
            transition: top 1s;
        }
    </style>
</head>
<body>
<div id="scrollDiv">
    <img src="image1.jpg" alt="Image 1" id="img1">
    <img src="image2.jpg" alt="Image 2" id="img2" style="top: 200px;">
</div>
<button onclick="scrollUp()">上滚</button>
<button onclick="scrollDown()">下滚</button>

<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<script>
    function scrollUp() {
        $('#img2').css('top', '200px');
        $('#img1').animate({top: '-=200px'}, 1000);
        $('#img2').animate({top: '0px'}, 1000);
    }

    function scrollDown() {
        $('#img1').css('top', '0px');
        $('#img2').animate({top: '200px'}, 1000);
        $('#img1').animate({top: '0px'}, 1000);
    }
</script>
</body>
</html>