求解，为啥没办法输出呀，多谢多谢
<!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 myarry=new Array();
for(var i=0;i<3;i++){
myarry[i]=new Array();
for(var y=0;y<6;y++){
myarry[i][y]=i*y;
document.write(myarry[2][5]);
}}
</script>
</head>
<body>
</body>
</html>
