js实现钟表

在网页上显示一个钟表

html:

<body onload="startTime()">
    <div id="txt"></div>
</body>

js:

    function startTime(){
        var today = new Date();
        var h = today.getHours();
        var m = today.getMinutes();
        var s = today.getSeconds();

        m = checkTime(m);
        s = checkTime(s);
        document.getElementById("txt").innerHTML = h + ":"+ m + ":" + s;
        t = setTimeout('startTime()',500);
    }
    function checkTime(i){
        if (i<10){
            i="0" + i
        }
        return i
    }

 

posted @ 2017-10-31 14:02  huahua_0825  阅读(187)  评论(0)  编辑  收藏  举报