Js控制css——模仿視頻網站關燈開燈

來源:互聯網
上載者:User

 

<head>
    <title></title>
    <style type="text/css">
        .day
        {
            background-color:White;
        }
       
        .night
        {
            background-color:Black;
        }
    </style>
    <script type="text/javascript">
        function SwitchLight() {
            var btn = document.getElementByIdx_x("btnChange");

            if (document.body.className == "night") {
                document.body.className = "day";
                btn.value = "關燈";
            }
            else if (document.body.className == "day") {
                document.body.className = "night";
                btn.value = "開燈";
            }
        }
    </script>
</head>
<body class="night">
    <input id="btnChange" type="button" value="開燈" onclick="SwitchLight()" />
</body>

聯繫我們

該頁面正文內容均來源於網絡整理,並不代表阿里雲官方的觀點,該頁面所提到的產品和服務也與阿里云無關,如果該頁面內容對您造成了困擾,歡迎寫郵件給我們,收到郵件我們將在5個工作日內處理。

如果您發現本社區中有涉嫌抄襲的內容,歡迎發送郵件至: info-contact@alibabacloud.com 進行舉報並提供相關證據,工作人員會在 5 個工作天內聯絡您,一經查實,本站將立刻刪除涉嫌侵權內容。

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.