js 倒计时（可自定义时间）
原文 链接 http://www.cnblogs.com/liygheart/p/3605160.html
<html>
<head>
<title>js 倒计时</title>
</head>
<body>
<div>
<h4>距离<input type="text" id="inputdate" value="2014-4-5"/> <button onclick="djs()">还有</button></h4>
<div id="left"> </div>
</div>
</body>
</html>
<script LANGUAGE="javascript">
djs();
var timerID = null;
var timerRunning = false;
var year, month, day;
function djs () {
var inputdate = document.getElementById("inputdate").value;
var splitdate = inputdate.split("-");
year = splitdate[0];
month = splitdate[1];
day = splitdate[2];
startclock();
}
function showtime() {
Today = new Date();
var NowHour = Today.getHours();
var NowMinute = Today.getMinutes();
var NowMonth = Today.getMonth();
var NowDate = Today.getDate();
var NowYear = Today.getYear();
var NowSecond = Today.getSeconds();
NowYear=1900+NowYear;
Today = null;
Hourleft = 23 - NowHour
Minuteleft = 59 - NowMinute
Secondleft = 59 - NowSecond
Yearleft = year - NowYear
Monthleft = month - NowMonth - 1
Dateleft = day - NowDate
if (Secondleft<0){
Secondleft=60+Secondleft;
Minuteleft=Minuteleft-1;
}
if (Minuteleft<0){
Minuteleft=60+Minuteleft;
Hourleft=Hourleft-1;
}
if (Hourleft<0){
Hourleft=24+Hourleft;
Dateleft=Dateleft-1;
}
if (Dateleft<0){
Dateleft=31+Dateleft;
Monthleft=Monthleft-1;
}
if (Monthleft<0){
Monthleft=12+Monthleft;
Yearleft=Yearleft-1;
}
Temp=Yearleft+'年-'+Monthleft+'月-'+Dateleft+'天 '+Hourleft+'时:'+Minuteleft+'分:'+Secondleft+'秒'
document.getElementById("left").innerHTML=Temp;
timerID = setTimeout("showtime()",1000);
timerRunning = true;
}
var timerID = null;
var timerRunning = false;
function stopclock () {
if(timerRunning){
clearTimeout(timerID);
timerRunning = false;
}
}
function startclock () {
stopclock();
showtime();
}
</script>
运行后效果：
