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实现效果:
在线演示地址:http://codepen.io/anon/pen/VLzgYO
DEMO:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>倒计时:By @me-kevin</title> <style type="text/css"> *{margin: 0;padding: 0;} ul,li{list-style: none;} .goodsList{ width: 984px; margin: 15px auto; } .unit{ display: inline-block; float: left; width: 220px; padding: 10px; margin: 0 2px; border: 1px solid #e7e7e7; } .timer { height: 100px; width: 100%; text-align: center; line-height: 100px; background-color: #9d55b8; color: #fff; font-size: 22px; } .btn{ border: 0; outline:0; width: 100%; margin: 5px 0; height: 36px; cursor: pointer; line-height: 36px; border-radius: 3px; text-shadow:0 0 1px rgba(0,0,0,.3); background-color: #56abe4; color: #fff; } </style> </head> <body> <div class="goodsList"> <ul class="unit"> <li>June 17,2015 20:15:0</li> <li><button class="btn">开始</button></li> <li class="timer">剩余:00天01时00分00妙</li> </ul> <ul class="unit"> <li>June 17,2015 17:53:0</li> <li><button class="btn">开始</button></li> <li class="timer">剩余:00天01时00分00妙</li> </ul> <ul class="unit"> <li>June 17,2015 20:3:0</li> <li><button class="btn">开始</button></li> <li class="timer">剩余:00天01时00分00妙</li> </ul> <ul class="unit"> <li>June 17,2015 19:3:0</li> <li><button class="btn">开始</button></li> <li class="timer">剩余:00天01时00分00妙</li> </ul> </div> <script type="text/javascript"> var ulArr=document.getElementsByTagName(‘ul‘); for(var i=0;i<ulArr.length;i++){ ulArr[i].index=i; counter(ulArr[i]); } function counter(aUl){ var aLi=aUl.getElementsByTagName(‘li‘); var timer=null; aLi[1].onclick=function(){ clearInterval( timer ); timer=setInterval(function(){ var startTime=new Date();//开始时间 var endTime=new Date(aLi[0].innerHTML);//结束时间 var t = Math.floor((endTime - startTime)/1000);// 毫秒 -> 秒 var str = Math.floor(t/86400)+‘天‘+Math.floor(t%86400/3600)+‘时‘+Math.floor(t%86400%3600/60)+‘分‘+t%60+‘秒‘; // 天:Math.floor(t/86400) // 时:Math.floor(t%86400/3600) // 分:Math.floor(t%86400%3600/60) // 秒:t%60 // 数字形式:new Date( 2013,4,1,9,48,12 ); // 字符串形式:new Date(‘June 10,2013 12:12:12‘); // January、February、March、April、May、June、 // July、August、September、October、November、December if(t>=0){ aLi[2].innerHTML=str; }else{ clearInterval( timer );//到达指定时间时,停止计数器 alert(‘计时已结束‘); } },1000) } } </script> </body> </html>
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原文地址:http://www.cnblogs.com/kevinCoder/p/4584037.html