Mechanize question

Hi, Im using mechanize and Im trying to get the values from a select by selecting another select.

<select name="maid" id="maid"><option value="1">Made</option></select>
<select name="moid" id="moid"></select>

When I select an option from select “maid” it makes an Ajax call and populate select “moid”.
I already select the first select, but I cant get the values from second select.
How can I do that?

Thanks.