34a35,37
> 
>   for ($i = 10; $i <= 100; $i += 10) {
>     $options[$i] = $i;
39c42
<     '#options' => array(10, 20, 30, 40, 50, 60, 70, 80, 90, 100), //items per page
---
>     '#options' => $options,