<script type="text/javascript">

         var num = ;

         //间隔一秒循环执行

         var id = setInterval(function ()

         {

             num = num + ;

             document.getElementById("ss").value = num;

         }, );

         //间隔一秒执行一次

         var ids = setTimeout(function () {

             num = num + ;

             document.getElementById("ss").value = num;

         }, );

         //停止方法

         function stopModth() {

             clearInterval(id);

             clearTimeout(ids);

         }

    </script>