話不多說,請看實例代碼
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>js倒計時顯示-細數逝去的過往</title> <style type="text/css"> #clock { font: bold 24pt sans; background-color: #f5f5f5; padding: 10px 15px; border: 1px solid #ccc; border-radius: 5px; } .demo { position: absolute; margin-left: 40%; margin-top: 40%; } </style> </head> <body> <div class="demo"> <center> <h1>下班倒計時顯示</h1> </center> <span id="clock"></span> </div> <script> function displayTime() { var elt = document.getElementById("clock"); if(leftTime < 0) { elt.innerHTML = "Over"; } else { var endTime = new Date("2016/11/21 18:00:00"); var now = new Date(); var leftTime = endTime.getTime() - now.getTime(); var ms = parseInt(leftTime % 1000).toString(); leftTime = parseInt(leftTime / 1000); var o = Math.floor(leftTime / 3600); var d = Math.floor(o / 24); var m = Math.floor(leftTime / 60 % 60); var s = leftTime % 60; elt.innerHTML = o + "小時:" + m + "分:" + s + "秒:" + ms.charAt(0); setTimeout(displayTime, 100); } } displayTime(); </script> </body> </html>
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