JavaScript实现新年倒计时网页特效

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>JS时间倒计时</title>
<script type="text/javascript">
 
 
var time_now_server,time_now_client,time_end,time_server_client,timerID;
 
//结束时间
time_end=new Date("2015/12/31 09:00:00");
time_end=time_end.getTime();
//开始的时间:如果不填入时间日期默认为当前的日期时间
time_now_server=new Date;
time_now_server=time_now_server.getTime();
 
time_now_client=new Date();
time_now_client=time_now_client.getTime();
 
time_server_client=time_now_server-time_now_client;
 
setTimeout("show_time()",1000);
 
 
//显示时间函数
function show_time()
{
 var timer = document.getElementById("timer");
 if(!timer){
 return ;
 }
 timer.innerHTML =time_server_client;
 
 var time_now,time_distance,str_time;
 var int_day,int_hour,int_minute,int_second;
 var time_now=new Date();
 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()",1000);
 
 }
 else
 {
 
 timer.innerHTML =timer.innerHTML;
 clearTimeout(timerID)
 window.location.href="http://www.baidu.com";
 }
}
</script>
</head>
 
<body>
<div id="timer" style="font-size:5em; text-align:center; font-family:'BebasNeueRegular', Arial, Helvetica, sans-serif; text-shadow:0 0 5px #00c6ff; "></div>
 
<div id="yu" style="font-size:5em; text-align:center; font-family:'BebasNeueRegular', Arial, Helvetica, sans-serif; text-shadow:0 0 5px #00c6ff; "></div>
</body>
</html>