<body>
<!--先编写好网页布局-->
<h2>操作成功</h2>
<p><span id="minute"></span>秒回到主页<a href="javascript:back();">返回</a></p>
<script type="text/javascript">
var num=5;
var myId=document.getElementById("minute");
setInterval("myfunction()",1000);
function myfunction(){
myId.value=num;
num--;
if(num==0){
window.open("http://www.baidu.com/", "_blank");
}
}
function back(){
window.history.back();
}
柠檬酸钠