js实现考试倒计时

<html>

   <head>
   </head>

   <body>
      <input type="text" name="mss" id="mss"/>
      
      <form action="./index.html">
        <input type="text" value="name" name="name"/>   

     </form>
 
   <body>

</html>


<script type="text/javascript">
<!--
   window.onload=function(){
     
        daojishi();
     }

      var counttime=90*60;//总秒钟
     
      function daojishi(){
      if(counttime>=0){
             var ms = counttime%60;//余数 89%60==29秒
             var mis = Math.floor(counttime/60);//分钟
             if(mis>=60){
              var hour=Math.floor(mis/60);

     mis=Math.floor((counttime-hour*60*60)/60);

              document.getElementById("mss").value=hour+"小时"+mis+"分"+ms+"秒数";
             }else if(mis>=1){
              document.getElementById("mss").value=mis+"分"+ms+"秒数"; 
             }else{
              document.getElementById("mss").value=ms+"秒数"; 
             }

   
              counttime--;
              vartt =  window.setTimeout("daojishi()",1000);
   }else{
       window.clearTimeout(vartt);
       window.confirm("考试时间结束,请单击提交"); 
       tijiao();
      
   }

   
     }
     
     function tijiao(){
        document.forms[0].submit();
     }
//-->
</script>

posted @ 2018-08-22 17:30  飞蚊  阅读(3839)  评论(0编辑  收藏  举报