说明：  jQuery展开折叠侧栏导航菜单基于jquery.1.5.1.js制作，蓝色风格，点击菜单收缩折叠效果，适合OA办公、会员中心等后台系统使用，有个人中心、课程中心、校内讨论、资源中心等菜单栏目。
(jQuery Expand folded side bar navigation menu based jquery.1.5.1.js production, blue style, click on the menu shrink fold effect for OA office, members of center back system, personal center, course center, campus discussion, Resource Center and other menu columns.)