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js網頁實時倒計時精確到秒級

 網頁實時倒計時,精確到秒級,和天數倒計時原理一樣,需要的朋友可以參考下

一個很好用的js倒計時!網頁實時倒計時,精確到秒級,和天數倒計時原理一樣。js倒計時一般用於商城網站團購,特賣,很多地方都可用到!希望能夠給大家帶來幫助!    效果如下:   代碼如下: <!DOCTYPE html>  <html>  <head>  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />  <style type="text/css">  .leave_time_font{margin-left:35%;}  #fo{margin-left:32%;}  </style>  <title>WoYaoNi.CN-倒計時</title>  </head>  <body>  <h1>WoYaoNi.CN </h1>  <script src="./jquery.js"></script>  <script type="text/javascript">  $(document).ready(function(e) {  var _countSeconds = 0;  function _countDown(){  _countSeconds ++;  $('input.surplustime').each(function(index, element) {  var $this = $(this);  var _totalTime = Number($this.val()) - _countSeconds;  var _day = parseInt(_totalTime/86400);  var _hours = parseInt(_totalTime%86400/3600);  var _minutes = parseInt(_totalTime%86400%3600/60);  var _seconds = parseInt(_totalTime%86400%3600%60);  var _strLite = '<span class="day">'+_day+'</span>天<span class="hour">'+_hours+'</span>小時<span class="minutes">'+_minutes+'</span>分<span class="seconds">'+_seconds+'</span>秒';  var _str = '倒計時:'+_strLite;  if($this.next('p.daojishi').length > 0){  $this.next('p.daojishi').html(_str);  }else if($this.next('p.leave_time_font').length > 0){  $this.next('p.leave_time_font').html(_strLite);  }  });  }  setInterval(_countDown, 1000);  })  </script>  </head>  <body>  <?php  ini_set('date.timezone','Asia/Shanghai');  $currenttime = time();  $a = strtotime('2014-2-14 00:00');  $b = $a-$currenttime;  ?>    <div id="djs">  <div id="fo">小伙伴們距離情人節只剩:</div>  <input type="hidden" name="surplustime" class="surplustime" value="<?php echo $b; ?>" />  <p class="leave_time_font"><span class="day">0</span>天<span class="hour">0</span>小時<span class="minutes">0</span>分<span class="seconds">0</span>秒</p>  </div>  </body>  </html>   
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