$(document).ready(function () {

    $('.down-list').width($('.dropdown-menu').width()-2);

    $('.dropdown-menu').hover(
      function () {
        $('.menu-first', this).addClass('slide-down').css({'border-bottom-left-radius': '0', 'border-bottom-right-radius': '0'});
        $('.down-list', this).slideDown(100).css('position', 'fixed');
      },
      function () {
        obj = this;
        $('.down-list', this).slideUp(150, function(){ $('.menu-first', obj).removeClass('slide-down').css({'border-bottom-left-radius': '4px', 'border-bottom-right-radius': '4px'}); });
      }
    );


});