<div id="nowTime"></div> <br><br> <div id="leftTime"></div><script> var leftTime = "20:00"; var t = ""; function disTime(){ t = setTimeout("disTime()",10); if(leftTime == "0:00"){ clearTimeout(t); }
//当前时间 var time = new Date().toLocaleString(); document.getElementById("nowTime").innerHTML = time;
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<div id="nowTime"></div>
<br><br>
<div id="leftTime"></div><script>
var leftTime = "20:00";
var t = "";
function disTime(){
t = setTimeout("disTime()",10);
if(leftTime == "0:00"){
clearTimeout(t);
}
//当前时间
var time = new Date().toLocaleString();
document.getElementById("nowTime").innerHTML = time;
document.getElementById("leftTime").innerHTML = leftTime;
var temp = leftTime.split(":");
if(temp[1] == '00'){
temp[1] = '59';
temp[0] = (parseInt(temp[0]) - 1) + "";
}else{
if(/^0[1-9]$/.test(temp[1])){
temp[1] = temp[1].charAt(1);
}
temp[1] = parseInt(temp[1]) - 1;
if(temp[1] < 10){
temp[1] = "0" + temp[1];
}else{
temp[1] = temp[1] + "";
}
}
leftTime = temp.join(":");
}
disTime();
</script>
写代码没花多久,小调了一下