js倒计时插件

 1 <script defer type="text/javascript">        
 2 function settime() 
 3 {            
 4 var time = "2013/2/13/11/45/00"; /*这里设置日期，注意:time的格式  "年/月/日/时/分/秒"*/            
 5 var date = time.split(‘/‘);            
 6 var date1 = new Date(); //目标日期            
 7 var date2 = new Date(); //当前时间  
 8 date1.setFullYear(date[0], (date[1]-1), date[2]); //设置目标日期的年，月，日            
 9 date1.setHours(date[3], date[4], date[5], 0); //设置目标日期的时，分，秒，毫秒   
10 if (date1.getTime()<date2.getTime()){
11 alert("活动结束");
12 window.location.href="top.htm" 
13 }
14 else
15 {          
16 var differtime = parseInt((date1.getTime() - date2.getTime()) / 1000);           
17 timeold=(date1.getTime()-date2.getTime());           
18 sectimeold=timeold/1000           
19 secondsold=Math.floor(sectimeold);           
20 msPerDay=24*60*60*1000          
21 e_daysold=timeold/msPerDay          
22 daysold=Math.floor(e_daysold);          
23 e_hrsold=(e_daysold-daysold)*24;          
24 hrsold=Math.floor(e_hrsold);         
25 e_minsold=(e_hrsold-hrsold)*60;         
26 minsold=Math.floor((e_hrsold-hrsold)*60);          
27 seconds=Math.floor((e_minsold-minsold)*60); 
28          
29 var html="<b><align=center><font color=red>"+daysold+"天"+hrsold+"小时"+minsold+"分"+seconds+"秒"+"</font>" ;            
30 document.getElementById("span_dt_dt").innerHTML = html;            
31 setTimeout("settime()", 1000);        
32 }
33 }    
34 </script>