<!--
var maxtime = 60*60 //一个小时，按秒计算，自己调整!
function CountDown(){
if(maxtime>=0){
minutes = Math.floor(maxtime/60)
seconds = Math.floor(maxtime%60)
minutes = minutes>=10?minutes:'0'+minutes
seconds = seconds>=10?seconds:'0'+seconds
msg = "距离结束还有"+minutes+"分"+seconds+"秒"
document.all["timer"].innerHTML=msg
if(maxtime == 5*60) alert('注意，还有5分钟!')
--maxtime
}
else{
clearInterval(timer)
alert("时间到，结束!")
}
}
timer = setInterval("CountDown()",1000)
//-->
</SCRIPT>
<meta charset="utf-8">
<div id="timer" style="color:red"></div>
JS实现倒计时(时、分，秒)var
interval
=
1000
function
ShowCountDown(year,month,day,divname)
{
var
now
=
new
Date()
var
endDate
=
new
Date(year,
month-1,
day)
var
leftTime=endDate.getTime()-now.getTime()
var
leftsecond
=
parseInt(leftTime/1000)
//var
day1=parseInt(leftsecond/(24*60*60*6))
var
day1=Math.floor(leftsecond/(60*60*24))
var
hour=Math.floor((leftsecond-day1*24*60*60)/3600)
var
minute=Math.floor((leftsecond-day1*24*60*60-hour*3600)/60)
var
second=Math.floor(leftsecond-day1*24*60*60-hour*3600-minute*60)
var
cc
=
document.getElementById(divname)
cc.innerHTML
=
"脚本之家提示距离"+year+"年"+month+"月"+day+"日还有："+day1+"天"+hour+"小时"+minute+"分"+second+"秒"
}
window.setInterval(function(){ShowCountDown(2010,4,20,'divdown1')},
interval)
[Ctrl+A
全选
注:如需引入外部Js需刷新才能执行]
function timeshow(){var time = 3//s
var start = window.setInterval(function(){
time = time - 1
console.log(time)
document.getElementById('show').innerHTML='计时开始，'+time+'秒后跳转!'
if(time == 0){
window.clearInterval(start)
document.getElementById('show').innerHTML='计时结束'
}
},1000)
}
