今天学到了一个倒计时效果，本人脑子有点慢，琢磨了半天时间。做完之后给乱码看了下，学到了 一个知识点 x|0 取x整数 ，再此感谢乱码。
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title>leftTime</title>
<meta name="description" content="">
<meta name="keywords" content="">
<link href="" rel="stylesheet">
<script type="text/javascript">
var interval = 1000;
function countDown(year,month,day,divname){
var nowTime = new Date();
var endTime = new Date(year,month-1,day);
var leftTime =endTime.getTime()-nowTime.getTime();
var leftSecondes = parseInt(leftTime/1000);
var day1 = leftSecondes/(60*60*24) | 0;
var hours = (leftSecondes - day1*60*60*24 ) / 3600 | 0 ;
var minute = (leftSecondes - day1*60*60*24 - hours*3600)/60 | 0;
var secondes = (leftSecondes - day1*60*60*24 - hours*3600 -minute*60) | 0;
var oDemo = document.getElementById(divname);
oDemo.innerHTML = "距离婚纱照："+year+"年"+month+"月"+day+"日还有 "+day1+"天"+hours+"时"+minute+"分钟"+secondes+"秒";
}
window.setInterval(function(){
countDown(2014,7,25,‘demo‘)
},interval)
</script>
</head>
<body>
<div id="demo"></div>
</body>
</html>
原文：http://www.cnblogs.com/1989zhiyuan/p/3790619.html