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為什么代碼沒有效果呢

<!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-->
??<p>操作成功</p>
??<p><span?id="num">5</span>秒后返回主頁<input?type="button"?value="返回"?onclick="goback()"></p>
??
?
??<script?type="text/javascript">??
????var?num=5;
????function?numChange(){
????????num--;
????????if(num<0)
????????window.location.href('idcbgp.cn');
????????else
????????document.getElementById('num').innerHTML=num;
????????setTimeout('numChange',1000);
????}
????
????function?goback(){
????????window.history.go(-1);
????}
???
???setTimeout('numChange,1000');
???
?</script>?
</body>
</html>

alive落葉

2016-02-27

源自：JavaScript進階篇 8-17

關(guān)注問題我要回答

665

操作

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3 回答

qq_瘋癲的小甜蜜ME_0 回答被采納 +3 積分
2016-02-27

?<!DOCTYPE?html>
<html>
?<head>
??<title>瀏覽器對象</title>??
??<meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8"/>???
?</head>
?<body>
??
??<p>操作成功</p>
??<p><span?id="num">5</span>秒后返回主頁<input?type="button"?value="返回"?onclick="goback()"></p>
???
??
??<script?type="text/javascript">??
????var?num=5;
????function?numChange(){
????????num--;
????????if(num<0)
????????//window.location.href('idcbgp.cn');
window.location.href="http://idcbgp.cn";
????????else
????????document.getElementById('num').innerHTML=num;
????????setTimeout('numChange()',1000);
????}
?????
????function?goback(){
????????window.history.go(-1);
????}
????
???setTimeout('numChange()',1000);
????
?</script>?
</body>
</html>

問題解決

1 回復(fù) 有任何疑惑可以回復(fù)我~

收起回答

#1

alive落葉提問者

之前的為什么數(shù)字都不改變呢

2016-02-29 回復(fù) 有任何疑惑可以回復(fù)我~

#2

alive落葉提問者

哦哦，知道了

2016-02-29 回復(fù) 有任何疑惑可以回復(fù)我~

qq_瘋癲的小甜蜜ME_0
2016-02-27

?<!DOCTYPE?html>
<html>
?<head>
??<title>瀏覽器對象</title>??
??<meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8"/>???
?</head>
?<body>
??
??<p>操作成功</p>
??<p><span?id="num">5</span>秒后返回主頁<input?type="button"?value="返回"?onclick="goback()"></p>
???
??
??<script?type="text/javascript">??
????var?num=5;
????function?numChange(){
????????num--;
????????if(num<0)
? ? ? ? window.location.href="http://idcbgp.cn";
????????else
????????document.getElementById('num').innerHTML=num;
????????setTimeout('numChange()',1000);
????}
?????
????function?goback(){
????????window.history.go(-1);
????}
????
???setTimeout('numChange()',1000);
????
?</script>?
</body>
</html>