function print_array(arr)
{
var rows = arr.length;
var cols = arr[0].length;
for (i = 0; i < rows; i++) {
for (j = 0; j < cols; j++)
document.write(arr[i][j] + " ");
document.write("<br/ >\n");
}
}
var arr = [
[11, 32, 13, 81],
[20, 80, 50, 990]
];
print_array(arr);