html 分钟：秒（3:00）

Posted 2021-05-11

<span id="d2" style="font-size: 28px; color: blue; font-weight: bold;">&nbsp;</span>
<script>
var seconds=180;
function display(){
timeleft=""+seconds % 60;
if (timeleft.length == 1) timeleft="0"+timeleft;
timeleft = Math.floor(seconds / 60) +":"+ timeleft;
document.getElementById("d2").innerHTML=timeleft;

if (seconds>0){
     seconds-=1;
     setTimeout("display()",1000);
}
}

display()
</script>