$(document).ready(function(){
         $('.down-list').width($('.dropdown-menu').width()-2);
          $('.dropdown-menu').hover(
		  
            function () {
              $('.menu-first', this).addClass('slide-down');
              $('.down-list', this).slideDown(70);
            },
 
            function () {
              obj = this;
              $('.down-list', this).slideUp(200, function(){ $('.menu-first', obj).removeClass('slide-down'); });
            }
          );
      });