$(document).ready(function(){
	$('.down-list').width($('.dropdown-menu').width()-2);
	$('.dropdown-menu').hover(
	  function () {
		$('.menu-first', this).addClass('slide-down');
		$('.down-list', this).slideDown(100);
	  },
	  function () {
		obj = this;
		$('.down-list', this).slideUp(100, function(){ $('.menu-first', obj).removeClass('slide-down'); });
	  }
	);
});