代碼求教,瀏覽器中效果無法實現(xiàn)
<!DOCTYPE html>
<html>
?<head>
? <title>瀏覽器對象</title> ?
? <meta http-equiv="Content-Type" content="text/html; charset=gkb"/>? ?
?</head>
?<body>
?
? <h4>操作成功</h4>
? <span><a id="miao">5</a>秒后回到主頁<a href="wy">返回</a></span>
? <script type="text/javascript"> ?
?? var num=5;
?? function sj(){
?????? num=num-1;
?????? miao.innerHTML=num;
?????? setTimeout(sj,1000);
?????? while(num<1){
??????? var wy=window.location.href;
??????? window.history.go(wy);
?????? }
?? }
?? setTimeout(sj,1000);
?</script>
</body>
</html>
2016-07-16
<!DOCTYPE?html> <html> ?<head> ??<title>瀏覽器對象</title>?? ??<meta?http-equiv="Content-Type"?content="text/html;?charset=gkb"/>??? ?</head> ?<body> ? ??<h4>操作成功</h4> ??<span><a?id="miao">5</a>秒后回到主頁<a?href="wy">返回</a></span> ??<script?type="text/javascript">?? ???var?num=5; ???function?sj(){ ???????num=num-1; ???????miao.innerHTML=num; ???????setTimeout(sj,1000); ???????//?while(num<1){?//這里是個死循環(huán)!!!!! ??????if(num==0){//改為判斷 ????????var?wy=window.location.href; ????????window.history.go(wy); ???????} ???????//可以在方法中從新執(zhí)行 ???????setTimeout(sj,1000); ???} ???//setTimeout?這個只會執(zhí)行一次 ???setTimeout(sj,1000); ?</script> </body> </html>2016-07-16
<!DOCTYPE html>
<html>
?<head>
? <title>瀏覽器對象</title> ?
? <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>? ?
?</head>
?<body>
?
? <h4>操作成功</h4>
? <!-- 返回點擊后市返回上一級網(wǎng)頁，5秒后返回主頁? -->
? <span><a id="miao">5</a>秒后回到主頁<a href="javascript:window.location.go(-1)">返回</a></span>
? <script type="text/javascript"> ?
?? var num=5;
?? function sj(){
?????? num=num-1;
?????? miao.innerHTML=num;
?????? setTimeout(sj,1000);
????? if(num<1){
??????? window.location.href =? "http://idcbgp.cn/";
?????? }
?? }
?? //啟動函數(shù)，執(zhí)行1次
?? setTimeout(sj,1000);
?</script>
</body>
</html>
2016-07-16
<!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(wǎng)頁布局-->
? <h1>操作成功</h1>
? <p>
????? <span id="num">5</span>秒后返回到主頁 <a href="javascript:window.history.go(-1)">返回</a>
? </p>
?
? <script type="text/javascript"> ?
?
?? //獲取顯示秒數(shù)的元素，通過定時器來更改秒數(shù)。
??? function settime(){
??????? var num=document.getElementById('num').innerHTML;
??????? num--;
??????? document.getElementById('num').innerHTML=num;
??????? if(num==0){
??????????? window.location="http://idcbgp.cn/";
??????? }
??? }
??? setInterval(settime,1000);
?? //通過window的location和history對象來控制網(wǎng)頁的跳轉。
? ?
?</script>
</body>
</html>