js动态显示当前时间

<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
        <script type="text/javascript">
            function showTime() {
                nowtime = new Date();
                year = nowtime.getFullYear();
                month = nowtime.getMonth() + 1;
                date = nowtime.getDate();
                document.getElementById("mytime").innerText = year + "年" + month + "月" + date + " " + nowtime.toLocaleTimeString();
            }
            setInterval("showTime()", 1000);
        </script>
    </head>
    <body>
        <span id="mytime"></span>
    </body>
</html>
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原文地址：https://www.cnblogs.com/de-ming/p/14015509.html