jQuery(function( $ ){
  $('#nav ul#menu-artists li:not(.active) ul').hide();
  $('#nav ul#menu-artists li a').click(function (){
		$('#nav ul#menu-artists li ul').slideUp({ duration: 1000, easing: 'easeInOutSine' }).parent().removeClass('active');
		$(this).next('ul:hidden').slideToggle(1000, 'easeInOutSine').parent().addClass('active');
	});	
});