wp_nav_menu and jquery

Hello,

Im trying to apply some jquery on my walker_nav_menu. But nothing works.
Happy for any pointers or help at this point. Cant seem to get anything to work.
Oh, and the menu has to be onclick not hover. Thats why Im not using CSS.

This is my walker if this helps:

$menu_args = array(
			'menu' => 'Header',
			'theme_location' => 'Header',
			'container' => false,
			'walker'          => new Walker_Nav_Menu(),
			'items_wrap' => '%3$s'
		);
		wp_nav_menu($menu_args);