说明：  jQuery网页左侧分类导航菜单基于jquery.1.10.2.min.js制作，鼠标经过一级分类菜单，显示详细二级分类菜单，适用于教育课程、购物商城等产品分类较多的站点。
(The navigation menu on the left side of jQuery web page is based on jquery.1.10.2.min.js. The mouse passes through the first-level classification menu and displays the detailed second-level classification menu. It is suitable for the sites with more product classification such as education courses and shopping malls.)