jquery 倒计时效果实现秒杀思路

<script type="text/javascript"> 
$(function(){ 
countDown("2015/9/8 11:11:59","#colockbox1"); 
}); 
function countDown(time,id){ 
var day_elem = $(id).find('.day'); 
var hour_elem = $(id).find('.hour'); 
var minute_elem = $(id).find('.minute'); 
var second_elem = $(id).find('.second'); //if(typeof end_time == "string") 
var end_time = new Date(time).getTime(),//月份是实际月份-1 
sys_second = (end_time-new Date().getTime())/1000; 
var timer = setInterval(function(){ 
if (sys_second > 1) { 
sys_second -= 1; 
var day = Math.floor((sys_second / 3600) / 24); 
var hour = Math.floor((sys_second / 3600) % 24); 
var minute = Math.floor((sys_second / 60) % 60); 
var second = Math.floor(sys_second % 60); 
day_elem && $(day_elem).text(day);//计算天 
$(hour_elem).text(hour<10?"0"+hour:hour);//计算小时 
$(minute_elem).text(minute<10?"0"+minute:minute);//计算分钟 
$(second_elem).text(second<10?"0"+second:second);//计算秒杀 
} else { 
clearInterval(timer); 
} 
}, 1000); 
} 
</script>

html:

<div class="colockbox" id="colockbox1"> 
<span class="day">00</span> 
<span class="hour">00</span> 
<span class="minute">00</span> 
<span class="second">00</span> 
</div>

公司做了个秒杀页面，需要做一个倒计时效果，特此收藏

代码演示下载：https://3water.com/jiaoben/103648.html