$(document).ready(function() {
    var local_selector_form = $('#local_selector form');
    var local_selector_select = local_selector_form.find('select');
    var local_selector_button = local_selector_form.find('button');

    local_selector_button.hide();
    local_selector_select.bind('change', function() {
        local_selector_form.trigger('submit');
    });
});