var select_data = [];
select_data.office = [
[0, 0, " "],
[0, 1, "New York"],
[0, 2, "London"]
];

select_data.department = [
[0, 0, " "],
[1, 1, "Executive"],
[1, 2, "Administration"],
[1, 3, "Original Design"],
[1, 4, "Technology"],
[2, 5, "Original Design"],
];

select_data.each(function(one) {
  	one.each(function(two) {
		alert(select_data.one.two[0]);
	});
});