Nopcommerece 3.60v的下拉菜单

Question

在TopMenu.cshtml（Nopcommerce v3.60）中，我添加了下面给出的下拉菜单代码，它在v3.50中运行良好。现在我已升级到v3.60，此代码不显示下拉菜单，只显示菜单标题。

请指导我解决方案。

 <li id="Gen">
            <a href="">Gen</a>
            <ul id="GenSubMenu" class="dropdown-ul">
                <li><a href="@Url.RouteUrl("Topic", new { SeName = Html.GetTopicSeName("HondaCivic") })">@T("Honda Civic")</a></li>
                <li><a href="@Url.RouteUrl("Topic", new { SeName = Html.GetTopicSeName("HondaCity") })">@T("Honda City")</a></li>
                <li><a href="@Url.RouteUrl("Topic", new { SeName = Html.GetTopicSeName("ToyotaCorolla") })">@T("Toyota Corolla")</a></li>
            </ul>
        </li>

    <style type="text/css">
        .top-menu ul.dropdown-ul {
            display: none;
            position: absolute;
            background: #404040;
            margin-left: -8px;
        }

        .top-menu ul.dropdown-ul.active {
            display: block;
        }

        .top-menu ul.dropdown-ul li {
            float: none;
            margin: 0;
        }
    </style>

    <script type="text/javascript">
        $('#Gen').live('mouseenter', function () {
            $('#GenSubmenu').addClass('active');
        });
        $('#Gen').live('mouseleave', function () {
            $('#GenUsSubmenu').removeClass('active');
        });
    </script>