计时器：倒计时，自动跳转
<body> <input type="text" readonly="true" value="10" id="time"> </body>
<script language="javascript"> var t = 60;//60个1秒 var time = document.getElementById("time"); function fun(){ t--; time.value = t; if(t<=0){ window.location = "PostTestController.action?testId=" + testId; //提交 clearInterval(inter); } } var inter = setInterval("fun()",1000); //1000毫秒=1秒 </script>