setInterval("time_controller()",1000); function time_controller(){     $(".time_val").each(function(){          var time_id = "time_show_"+$(this).attr('for');          var time_val= $(this).attr('value');          $(this).attr('value',time_val-1);          show_time(time_id,time_val*1000);     }); } function show_time(id,timestamp) {     var timer = document.getElementById(id);     var str_time,int_day,int_hour,int_minute,int_second;     var time_distance = timestamp;     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="<b>剩余时间："+int_day+"天"+int_hour+"小时"+int_minute+"分钟"+int_second+"秒</b>";           timer.innerHTML=str_time;     }else{           timer.innerHTML="<b>剩余时间： 0天0小时0分钟0秒</b>";     } }

 <div class="time" id="time_show_{$list.cmd_id}"></div>  <input type="hidden"  class="time_val" for="{$list.cmd_id}" value="{$list.time_val}" />