代码：　　
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>js简单获取时间</title>
</head>
<body>
    <div id="time"></div>
    <script type="text/javascript">
    var time = document.getElementById('time');
    function dateTime(){
        var dt = new Date();
        var y = dt.getFullYear();
        var m = dt.getMonth()+1;
        var d = dt.getDate();
        var h = dt.getHours();
        var i = dt.getMinutes();
        var s = dt.getSeconds();
        time.innerHTML=y+'-'+m+'-'+d+'-'+h+'-'+i+'-'+s;
    }
    setInterval('dateTime()',1000);
    </script>
</body>
</html>