这两个题怎么做，有没有大佬帮帮忙

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
        <div>
            <span id="showTime"></span>
        </div>
</body>
<script type="text/javascript">
    var t = null;
    t = setTimeout(time,1000);//開始运行
    function time()
    {
        clearTimeout(t);//清除定时器
        dt = new Date();
        var y=dt.getFullYear();//获取年
        var m=dt.getMonth();//获取月
        var d=dt.getDate();//获取日
        var h=dt.getHours();//获取时
        var f=dt.getMinutes();//获取分
        var s=dt.getSeconds();//获取秒
        document.getElementById("showTime").innerHTML =  "<span style='color: darkred;'>"+y+"年"+(m+1)+"月"+d+"日"+h+"时"+f+"分"+s+"秒 </span>";
        t = setTimeout(time,1000); //设定定时器，循环运行
    }
</script>
</html>

这个简单，js实现动态时间：

<!doctype html>
<html lang="en">
 <head>
  <meta charset="UTF-8">
  <title>Document</title>
 </head>
 <body>
  <div id="da"></div>
  <script>
	function dt(){
		document.getElementById('da').innerHTML=new Date().toLocaleString();
	}
	setInterval("dt()",1000);
  </script>
 </body>
</html>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
 <head>
  <title> Date类的使用 </title>
 </head>

 <body onload="setInterval('displayTime()',1000);">
  <h1>Date类的使用</h1>
  <hr>
  <div id="fonts"></div>
  
  <script type="text/javascript">
	function displayTime(){
		//年是以1900年为基准，月份是从0开始
		//创建Date对象
		var date = new Date();
		//获取年
		var year = date.getYear()+1900;
		//获取月
		var month = date.getMonth()+1;
		//获取日期
		var day = date.getDate();
		//获取时
		var hour = date.getHours();
		//获取分
		var minute = date.getMinutes();
		//获取秒
		var second = date.getSeconds();
		var s = year +"-"+month+"-"+day +" " +hour +":"+minute+":"+second;
		
		//获取标签
		var fonts = document.getElementById("fonts");
		fonts.innerHTML=s;
	}

	//setInterval()，每隔指定的时间内运行一次，单位是毫秒
  </script>
 </body>
</html>

<!DOCTYPE html>
<html lang="zh">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
</head>
<body>
	<div id="time"></div>
	<script>
		var container = document.getElementById('time')
		function flushDate() {
			var date = new Date()
			var year = date.getFullYear()
			var month = date.getMonth() + 1
			var day = date.getDay()
			var hour = date.getHours()
			var min = date.getMinutes()
			var second = date.getSeconds()
			if (month < 10) month = '0' + month
			if (day < 10) day = '0' + day
			if (hour < 10) hour = '0' + hour
			if (min < 10) min = '0' + min
			if (second < 10) second = '0' + second
			return `${year}-${month}-${day} ${hour}:${min}:${second}`
		}
		setInterval(() => {
			container.innerHTML = flushDate()
		}, 1000)
	</script>
</body>
</html>

如上，满意请采纳，谢谢。

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