<!DOCTYPE?html>
<html>
?<head>
??<title>瀏覽器對象</title>??
??<meta?http-equiv="Content-Type"?content="text/html;?charset=gkb"/>???
?</head>
?<body>
??<!--先編寫好網頁布局-->
??<h3>操作成功</h3>
??<p>
??????<input?type="text"?id="count"?value="15"/>秒后回到主頁
??????<a?href="#"?onclick="goback()">返回</a>
??</p>
??<script?type="text/javascript">??
??var?num=15;
??document.getElementById("count").style.border="none";
?document.getElementById("count").style.width="18px";
??
??function?countdown(){
??????num=num-1;
??????document.getElementById("count").value=num;
??????if(num<=0){window.open("http://www.xianlaiwan.cn","_self","width=1000,height=500");}
??}
???setInterval("countdown()",2000);
?????function?goback(){
???????window.history.back();
???}
???
?</script>?
</body>
</html>
2019-07-23
你把內容復制出來，自己本地創建一個xxxx.html然后復制進去，打開，能看到倒計時效果