<?php
$time = getdate();
//print_r($time);
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head></head>
<body>
<span id="Clock" style="font-weight: bold;"></span>
</body>
<script language="javascript">
var ServerDate = new Date(<?php echo $time['year'].",".($time['mon']-1).",".$time['mday'].",".($time['hours']+8).",".$time['minutes'].",".$time['seconds'];?>);
var ClientDate= new Date();
var d=ClientDate-ServerDate;//計算S和C之間的時差，單位毫秒
var starttime = new Date(2011,8,6,9,0,0);//開始時間
var stoptime = new Date(2011,8,6,19,0,0);//結束時間
function clock()
{
var today = new Date();
today.setTime(today.getTime()-d);//同步日期到服務器時間
var leave=stoptime-today;
if(leave>=1000)
{
var timeString="";
var day = Math.floor(leave / (1000 * 60 * 60 * 24));
leave-=day*(1000 * 60 * 60 * 24);
if(day>0)timeString+=day + "天"
var hour = Math.floor(leave / (1000 * 60 * 60));
leave-=hour*(1000 * 60 * 60);
if(hour>0)
{
if(timeString!="")timeString+=",";
timeString+=hour + "小時"
}
var minute = Math.floor(leave / (1000 * 60));
leave-=minute*(1000 * 60);
if(minute>0)
{
if(timeString!="")timeString+=",";
timeString+=minute + "分"
}
var second = Math.floor(leave / 1000);
if(timeString!="")timeString+=",";
timeString+=second + "秒"
document.getElementById("Clock").innerHTML = "離活動開始還有 " + timeString;
}
else
{
if((stoptime-today)>0)
{
}
}
setTimeout("clock()", 1000);
}
clock();
</script>
</html>php JS 倒計時（減少客戶端時間不同步時的誤差）
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