JS综合案例：倒计时广告牌
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<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>倒计时</title>
<script type="text/javascript">
function DownTime()
{
STTime();
SHTime();
}
function STTime()
{
if(TimerRunning)
clearTimeout(TimerID);
var TimerRunning = false;
}
function array()
{
this.length = 12;
this[0] = 31;this[1] = 28;this[2] = 31;this[3] = 30;this[4] = 31;this[5] = 30;
this[6] = 31;this[7] = 31;this[8] = 30;this[9] = 31;this[10] = 30;this[11] = 31;
}
var CClock = new array();
function SHTime()
{
today = new Date();
var CurrentMonth = today.getMonth();
var CurrentDate = today.getDate();
var CurrentYear = today.getFullYear();
now = null;
if (21 < CurrentDate) {CurrentDate -= CClock[CurrentMonth]; CurrentMonth++;}
if (7 < CurrentMonth) {CurrentMonth -= 12; CurrentYear++;}
var Yearleft = 2025 - CurrentYear;
var Monthleft = 1 - CurrentMonth+12;
var Dateleft = 1 - CurrentDate;
document.YMD.a.value = Yearleft;
document.YMD.b.value = Monthleft;
document.YMD.c.value = Dateleft;
TimerID = setTimeout('SHTime()',1000);
TimerRunning = true;
}
</script>
</head>
<body bgcolor="#fef4d2" onload=DownTime()>
<br><br>
<center>
<font color="ffaafa"><h2>倒计时</h2></font>
<hr width=300>
<br><br>
<form name='YMD' action="" method="get">
距离2025年1月1日只剩下
<input type='text' name='a' size=3 value=''/> 年
<input type='text' name='b' size=3 value=''/> 月
<input type='text' name='c' size=3 value=''/> 日
</form>
</body>
</html>
