版权声明：欢迎阅读，有误请指正，转载请申明。 https://blog.csdn.net/wx1995sss/article/details/87914041
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<div id='box'></div>
<script>
(function myfun4(times){
var outTime = new Date(2019,2,20,9,0,0);//设定一个倒计时的目标时间点
var outs = outTime.getTime();//获取目标时间点毫秒数
var nows = new Date();//获取当前时间点
var ins = nows.getTime();//转化为毫秒数
var times = Math.floor((outs-ins)/1000);//目标时间点毫秒数减去当前时间毫秒数然后转为秒
setInterval(function(){
var days =0,hours =0,minutes =0,seconds =0;
if(times>0){
days = Math.floor(times/(60*60*24));
hours = Math.floor(times/(60*60)-(days*24));
minutes = Math.floor((times/60)-(hours*60)-(days*24*60));
seconds = Math.floor(times-(days*24*60*60)-(hours*60*60)-(minutes*60));
}
if(days<=9){days="0"+days;}
if(hours<=9){hours="0"+hours;}
if(minutes<=9){minutes="0"+minutes;}
if(seconds<=9){seconds="0"+seconds;}
var box =document.getElementById('box');
box.innerHTML="距离2019年3月20号9点整还有："+days+"天"+hours+"时"+minutes+"分"+seconds+"秒";
times--;
},1000);
if(times<=0){
clearInterval(times);
}
})();//表达式函数，自执行
</script>
</body>
</html>