優れたJS HTMLページカウントダウンは、シンプルですが実用的な数秒まで正確になる場合があります
<!Doctype html> <html> <head> <meta charset = "utf-8"> </head> <body> <div id = "countmsg"> <span id = "t_d"> 00日</span </span> <span id = "t_h"> 00 hours </span> <span = "t_m"> 00分< </div> <script type = "text/javascript">関数getrtime(){var endtime = new date( '2014/10/23 10:00:00'); // Deadline 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/1000/60/60); 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 + "day"; document.getElementById( "t_h")。innerhtml = h + "time"; document.getElementById( "T_M")。innerhtml = m + "minutes"; document.getElementById( "t_s")。innerhtml = s + "秒"; } setInterval(getrtime、1000); </script> </body> </html>