JS操作form表单倒计时自动提交

 

只需要注意 表单的id

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<form id="frm" action="http://www.baidu.com"> 考试还剩余<div id="time"></div> </form> <script>     var times = 45 * 60;//剩余时间,单位秒     var timeDiv = document.getElementById("time");     var timeObj = null;     function timer(){         if(times == 0){             //倒计时结束，提交表单             document.getElementById("frm").submit();             window.clearInterval(timeObj);             return;         }         var t = Math.floor(times/60) +"分"+times%60+"秒"         timeDiv.innerHTML = t;         times --;     }     timeObj = window.setInterval(timer,1000); </script>