請(qǐng)教大神，我這樣為什么出不來(lái)顯示內(nèi)容，急
<!DOCTYPE? HTML>
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>數(shù)組</title>
<script type="text/javascript">
?//創(chuàng)建數(shù)組
var myarr=["*","##","***","&&","****","##*","**"];
?//顯示數(shù)組長(zhǎng)度
function shan(){
??? alert(myarr.length);
}
?//將數(shù)組內(nèi)容輸出，完成達(dá)到的效果。
?document.write(myarr[0])+"</br>"
document.write(myarr[7])+</br>
document.write(myarr[2])+</br>
document.write(myarr[4])+</br>
</script>
</head>
<body>
??? <form>
??????? <input type="button" onclick=shan() value="數(shù)組長(zhǎng)度"/>
??? </form>
</body>
</html>
2019-03-10
<!DOCTYPE ?HTML>
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>數(shù)組</title>
<script type="text/javascript">
?//創(chuàng)建數(shù)組
? ? var myarr = ['*','##',"***","&&","****","##*"];
? ? myarr[7] = "**";
?//顯示數(shù)組長(zhǎng)度
? ? alert(myarr.length);
?
?//將數(shù)組內(nèi)容輸出，完成達(dá)到的效果。
? ? for (var i=0; i <= 7; i++)
? ? {
? ? ? ? document.write(myarr[i] + "<br/>")
? ? }
</script>
</head>
<body>
</body>
</html>
2019-03-07
<br >也要在括號(hào)里
2019-02-28
<!DOCTYPE? HTML>
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>數(shù)組</title>
<script type="text/javascript">
?//創(chuàng)建數(shù)組
?var arr=['*','##',"***","&&","****","##*"];
?arr[7]="**";
?//顯示數(shù)組長(zhǎng)度
?var L=arr.length;
?function shan(){
? ? ?alert(L);
?}
//? document.write("數(shù)值長(zhǎng)度為："+L+"<br>");
?
?//將數(shù)組內(nèi)容輸出，完成達(dá)到的效果。
document.write(arr[0]+"<br>"+"<br>");
document.write(arr[7]+"<br>"+"<br>");
document.write(arr[2]+"<br>"+"<br>");
document.write(arr[4]+"<br>"+"<br>");
</script>
</head>
<body>
? ? <form>
? ? ? ? <input type="button" onclick="shan()" value="顯示長(zhǎng)度"/>? ? ? ?
? ? </form>? ??
</body>
</html>
2019-02-26
下邊三個(gè)換行沒(méi)有加引號(hào)