jsp 页面显示问题：spans[i].innerHTML=msg;不显示；spans[0~4].innerHTML=msg;显示！什么原因？在线等！谢谢啦！！

 <script type="text/javascript" src="${pageContext.request.contextPath }/js/jquery-1.8.3.js"></script>
<script type="text/javascript">
onload=function(){
    var ordertime;
    var timer;
    var inputs = $(".input");
    var spans = $(".span");
    var nowtime;
    var minutes;
    var seconds;
    var msg;
    var size=inputs.size();
    for(var i = 0;i<size;i++){
        //alert(size);
        ordertime = inputs[i].value;
        ordertime=ordertime.replace("-","/");
        ordertime=ordertime.replace("-","/");
        ordertime=new Date(ordertime);
        nowtime=new Date();
        //alert();
        maxtime = (ordertime.getTime()-nowtime.getTime())/1000+30*60;
        timer = setInterval( function CountDown(){ 
             if(maxtime>=0){  
                minutes = Math.floor(maxtime/60);  
                seconds = Math.floor(maxtime%30);  
                msg = "距离结束还有"+minutes+"分"+seconds+"秒";  
                // alert(msg);
                spans[i].innerHTML=msg;
                 //document.getElementById("timer").innerHTML=msg;  
                 if(maxtime == 5*30) alert('注意，还有5分钟!');  
                 --maxtime;  
                 }  
                 else{  
                 clearInterval(timer);  
                 alert("时间到，结束!");  
                 }  
                 },1000);
    }
};
</script>

写在onready里看看，onload可能一些html元素还没有加载

 参数不对，
 spans[i].innerHTML这里运行的时候i已经是size的值了，定时部分用闭包解决变量冲突问题。setInterval用setTimeout
 (function(i,maxtime){
           var CountDown = function(){ 
             if(maxtime>=0){  
                minutes = Math.floor(maxtime/60);  
                seconds = Math.floor(maxtime%30);  
                msg = "距离结束还有"+minutes+"分"+seconds+"秒";  
                // alert(msg);
                spans[i].innerHTML=msg;
                 //document.getElementById("timer").innerHTML=msg;  
                 if(maxtime == 5*30) alert('注意，还有5分钟!');  
                 --maxtime;  
                 setTimeout(CountDown ,1000);
              }  
                 else{  
                 console.log("时间到，结束!");  
                 }  
                 }
           setTimeout(CountDown  ,1000);
        }(i,maxtime));