怎么没答案出来·??????,大家帮忙看看,谢谢
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>数组</title>
<script type="text/javascript">
var arr=['*','##','***','&&','###','****','##*'];
arr[7]="**";
alert(arr.length);
document.write("图案为:"arr[0]+"<br>"+arr+"<br>"+arr[2]+"<br>"+arr[4]+"<br>")
</script>
</head>
<body>
</body>
</html>