javascript实现倒计时（精确到秒）
代码相当简单实用，这里就不多废话了，小伙伴们简单看下就能明白
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDXHTML1.0Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<htmlxmlns="http://www.w3.org/1999/xhtml">
<head>
<metahttp-equiv="Content-Type"content="text/html;charset=utf-8"/>
</head>
<body>
<divid="demo01"class="colockbox">剩余
<iclass="day">0</i>天
<iclass="hour">0</i>时
<iclass="minute">0</i>分
<iclass="second">0</i>秒
<inputid="end_time_gou"type="hidden"value="2015/08/2013:00:00">
<inputid="now_gou"type="hidden"value="2015/06/2511:44:08">
</div>
<divid="timer"class="colockbox">
</div>
<scripttype="text/javascript"src="http://code.jquery.com/jquery-1.9.0.min.js"></script>
<script>
vartime_end=$('#end_time_gou').val();
vartime_now_server=$('#now_gou').val();
countDown(time_end,time_now_server,"#demo01.day","#demo01.hour","#demo01.minute","#demo01.second");
functioncountDown(endtime,now,day_elem,hour_elem,minute_elem,second_elem){
varend_time=newDate(endtime).getTime(),//月份是实际月份-1
current_time=newDate(now).getTime(),
sys_second=(end_time-current_time)/1000;
vartimer=setInterval(function(){
if(sys_second>0){
sys_second-=1;
varday=Math.floor((sys_second/3600)/24);
varhour=Math.floor((sys_second/3600)%24);
varminute=Math.floor((sys_second/60)%60);
varsecond=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
$(second_elem).text(second<10?"0"+second:second);//计算秒
}else{
clearInterval(timer);
}
},1000);
}
</script>
<scripttype="text/javascript">
vartime_now_server,time_now_client,time_end,time_server_client,timerID;
time_end=newDate($('#end_time_gou').val());//结束的时间
time_end=time_end.getTime();
time_now_server=newDate($('#now_gou').val());//开始的时间,服务器
time_now_server=time_now_server.getTime();
time_now_client=newDate();
time_now_client=time_now_client.getTime();//本地的时间
time_server_client=time_now_server-time_now_client;
setTimeout("show_time("+time_end+","+time_server_client+","+timerID+")",1000);
functionshow_time(time_end,time_server_client,timerID){
vartimer=document.getElementById('timer');
if(!timer){return;}
timer.innerHTML=timer.innerHTML;
vartime_now,time_distance,str_time;
varint_day,int_hour,int_minute,int_second;
vartime_now=newDate();
time_now=time_now.getTime()+time_server_client;
time_distance=time_end-time_now;
if(time_distance>0){
int_day=Math.floor(time_distance/86400000)
time_distance-=int_day*86400000;
int_hour=Math.floor(time_distance/3600000)
time_distance-=int_hour*3600000;
int_minute=Math.floor(time_distance/60000)
time_distance-=int_minute*60000;
int_second=Math.floor(time_distance/1000)
if(int_hour<10)
int_hour="0"+int_hour;
if(int_minute<10)
int_minute="0"+int_minute;
if(int_second<10)
int_second="0"+int_second;
str_time=int_day+"天"+int_hour+"小时"+int_minute+"分钟"+int_second+"秒";
timer.innerHTML=str_time;
setTimeout("show_time("+time_end+","+time_server_client+","+timerID+")",1000);
}else{
timer.innerHTML=timer.innerHTML;
clearTimeout(timerID)
}
}
</script>
</body>
</html>
以上所述就是本文的全部内容了，希望大家能够喜欢。