JS_2D_Assoc_Array_Neighbors.js

function array_nbr(row_idx, column_idx, rows, columns, level)
{
    level = level || 1;
    var nbr = [];
    for (var y = Math.max(0, row_idx - level); y <= Math.min(row_idx + level, rows); y++)
    {
        for (var x = Math.max(0, column_idx - level); x <= Math.min(column_idx + level, columns); x++)
        {
            nbr.push([x, y]);
        }
    }
    return nbr;
}