JavaScript の二次元配列

<script type="text/javascript">
    var data = new Array(3);
    for(i=0; i<3; i++)
        data[i] = new Array(4);
    for(i=0; i<3; i++)
        for(j=0; j<4; j++)
            data[i][j] = i*10+j;
    document.write(data, "<br>");
</script>

<script type="text/javascript">
    var ary = [[11, 12, 13, 14], [21, 22, 23, 24], [31, 32, 33, 34]];
    for(i=0; i<3; i++)
    {   for(j=0; j<4; j++)
            document.write(ary[i][j] + ",  ");
        document.write("<br>");
    }
</script>