為什么不能無(wú)線計(jì)時(shí)
<!DOCTYPE html>
<html>
?<head>
? <title>瀏覽器對(duì)象</title> ?
? <meta http-equiv="Content-Type" content="text/html; charset=gkb"/> ??
?</head>
?<body>
? <!--先編寫(xiě)好網(wǎng)頁(yè)布局-->
? <srtong>操作成功</srtong>
? <p><span id="setTimeout">5</span>秒后到主頁(yè)<a href="#">返回</a></p>
??
?
? <script type="text/javascript"> ?
var num=5 ? ?
? ?//獲取顯示秒數(shù)的元素，通過(guò)定時(shí)器來(lái)更改秒數(shù)。
? ?function aa(){
??
? ?document.getElementById("setTimeout").innerHTML=num;
??
? num--;
? ? setTimeout("aa()",1000)
? ?}
? ?//通過(guò)window的location和history對(duì)象來(lái)控制網(wǎng)頁(yè)的跳轉(zhuǎn)。
? ?
?</script>?
</body>
</html>
2016-04-20
好幾天沒(méi)上慕課了，沒(méi)注意，我改了下
<!DOCTYPE?html> <html> <head> ????<title>瀏覽器對(duì)象</title> ????<meta?http-equiv="Content-Type"?content="text/html;?charset=gkb"/> </head> <body> <!--先編寫(xiě)好網(wǎng)頁(yè)布局--> <srtong>操作成功</srtong> <div?id="setTimeout"><span?id="setTimeout1"></span>秒后到主頁(yè)<a?href="#">返回</a></div> <script?type="text/javascript"> ????var?num?=?5; ????//獲取顯示秒數(shù)的元素，通過(guò)定時(shí)器來(lái)更改秒數(shù)。 ????var?add?=?document.getElementById("setTimeout"); ????var?span1?=?document.createElement("span"); ????function?num1()?{ ????????if(num>=0){ ????????????document.getElementById('setTimeout1').innerHTML?=?num; ????????????num--; ????????????setTimeout('num1()',?1000); ????????}else{ ????????????return; ????????} ????} ????span1.innerHTML?=?num1(); </script> </body> </html>我是先把函數(shù)封裝起來(lái)再調(diào)用就好了
2016-04-17
<!DOCTYPE?html> <html> <head> ????<title>瀏覽器對(duì)象</title> ????<meta?http-equiv="Content-Type"?content="text/html;?charset=gkb"/> </head> <body> <!--先編寫(xiě)好網(wǎng)頁(yè)布局--> <p>操作成果</p> <input?id="jishiqi"?value="6"?type="button"?style="border:?none;background-color:white;?"/><span>秒后回到主頁(yè)</span><a ????????href="#"?onclick="backBefore();">返回</a> <script?type="text/javascript"> ????var?a?=?document.getElementById("jishiqi"); ????function?dsq()?{ ????????if?(a.value?>?1)?{ ????????????a.value?=?a.value?-?1; ????????} ????????setTimeout("dsq();",?1000); ????} ????dsq(); ????setTimeout("openNewLink();",?5000); ????function?openNewLink()?{ ????????window.open("http://www.baidu.com",?'_self'); ????} ????function?backBefore()?{ ????????window.open(history.back(),?'_self'); ????} ????//獲取顯示秒數(shù)的元素，通過(guò)定時(shí)器來(lái)更改秒數(shù)。 ????//通過(guò)window的location和history對(duì)象來(lái)控制網(wǎng)頁(yè)的跳轉(zhuǎn)。 ????//???function?backBefore(){ ????//???} </script> </body> </html>倒數(shù)計(jì)時(shí)我是用input做的