代码对吗，为什么也通过了？
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>二维数组</title>
<script type="text/javascript">
var myarr=new Array();
myarr[3][6];
myarr[3][6]=3*6;
</script>
</head>
<body>
</body>
</html>
