Mobile Genesis menus

global.js

jQuery(document).ready(function($){
	// Mobile navigation
	$('#prim-selector, #sec-selector').change(function(){
		if ($(this).val()!='') {
			window.location.href=$(this).val();
		}
	});
});

responsive.php

<?php
/**
 * Mobile primary navigation
 *
 * @since 1.0
 */
function ja_mobile_menu_primary(){
	if (  has_nav_menu( 'primary') && genesis_get_option( 'nav' ) ){
		wp_nav_menu( array(
			'theme_location' => 'primary',
			'walker'         => new Walker_Nav_Menu_Mobile(),
			'items_wrap'     => '<select class="default" id="prim-selector" name="prim-selector">%3$s</select>',
			'container_id'   => 'mobile-menu-primary'
		));        
	}
}
add_action( 'genesis_before_header','ja_mobile_menu_primary' );

/**
 * Mobile secondary navigation
 *
 * @since 1.0
 */
function ja_mobile_menu_secondary(){
	if (  has_nav_menu( 'secondary') && genesis_get_option( 'subnav' )){
		wp_nav_menu( array(
			'theme_location' => 'secondary',
			'walker'         => new Walker_Nav_Menu_Mobile(),
			'items_wrap'     => '<select class="default" id="sec-selector" name="sec-selector">%3$s</select>',
			'container_id'   => 'mobile-menu-secondary'
		));       
	}
}
add_action( 'genesis_after_header','ja_mobile_menu_secondary' );

/**
 * Mobile menu walker class
 *
 * @since 1.0
 */
class Walker_Nav_Menu_Mobile extends Walker_Nav_Menu{
	
	var $to_depth = -1;

	function start_lvl( &$output, $depth ){
		$output .= '</option>';
	}

	function end_lvl( &$output, $depth ){
		$indent = str_repeat( "\t", $depth );
	}

	function start_el( &$output, $item, $depth, $args ){
		$indent = ( $depth ) ? str_repeat( "&nbsp;", $depth * 4 ) : '';
		$class_names = $value = '';
		$classes = empty( $item->classes ) ? array() : ( array ) $item->classes;
		$classes[] = 'menu-item-' . $item->ID;
		$class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item, $args ) );
		$class_names = ' class="' . esc_attr( $class_names ) . '"';
		$id = apply_filters( 'nav_menu_item_id', 'menu-item-'. $item->ID, $item, $args );
		$id = strlen( $id ) ? ' id="' . esc_attr( $id ) . '"' : '';
		$value = ' value="'. $item->url .'"';
		$output .= '<option' . $id. $value . $class_names . '>';
		$item_output = $args->before;
		$item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;
		$output .= $indent . $item_output;
	}

	function end_el( &$output, $item, $depth ){
		if( substr($output, -9 ) != '</option>')
			$output .= "</option>";
	}

}