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一個不錯的js html頁面倒計時可精確到秒，jshtml頁面倒計時
一個不錯的js html頁面倒計時可精確到秒，很簡單，但和實用
<!doctype html> <html> <head> <meta charset="utf-8"> </head> <body> <DIV id="CountMsg" class="HotDate"> <span id="t_d">00天</span> <span id="t_h">00時</span> <span id="t_m">00分</span> <span id="t_s">00秒</span> </DIV> <script type="text/javascript"> function getRTime(){ var EndTime= new Date('2014/10/23 10:00:00'); //截止時間 var NowTime = new Date(); var t =EndTime.getTime() - NowTime.getTime(); /*var d=Math.floor(t/1000/60/60/24); t-=d*(1000*60*60*24); var h=Math.floor(t/1000/60/60); t-=h*60*60*1000; var m=Math.floor(t/1000/60); t-=m*60*1000; var s=Math.floor(t/1000);*/ var d=Math.floor(t/1000/60/60/24); var h=Math.floor(t/1000/60/60%24); var m=Math.floor(t/1000/60%60); var s=Math.floor(t/1000%60); document.getElementById("t_d").innerHTML = d + "天"; document.getElementById("t_h").innerHTML = h + "時"; document.getElementById("t_m").innerHTML = m + "分"; document.getElementById("t_s").innerHTML = s + "秒"; } setInterval(getRTime,1000); </script> </body> </html>
setTimeout("GetRTime()", 100); 改為setTimeout("GetRTime()", 20); 就是≈50毫秒了，1s = 1000ms，1000 ÷ 50 = 20，然後由於javascript的單線程方式，setTimeout並不一定會在20ms時執行，所以只能說≈了
怎用JavaScript寫一個60秒倒計時的js檔案
用 setTimeout("",1000); 引號裡面填要調用的方法
如: 頁面
<a id="time"></a>
javascript:
function send(){
var i = 61;
i--;
if(i==-1)
return null;
document.getElementById("time").innerHTML = i;
setTimeout("send();",1000);
}
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