Have you studied today? This article describes another way to implement navigation.
var_menus = { "Menus":[ {"MenuID": "1", "icon": "Icon-sys", "menuname": "Level Navigation", "Menus":[ {"MenuID": "A", "menuname": "Level Two navigation", "icon": "Icon-page", "url": ". /user/user_retrieve1.html "}, {"MenuID": "All", "menuname": "Level Two navigation", "icon": "Icon-class", "url": ". /role/role_retrieve1 "} ]}, {"MenuID": "+", "icon": "Icon-sys", "menuname": "Level Navigation", "Menus": [{"MenuID": "+", "menuname": "Level Two navigation", "icon": "Icon-role", "url": "). /findus/province_retrieve1 "}, {"MenuID": "A", "menuname": "Level Two navigation", "icon": "Icon-nav", "url": ". /findus/city_retrieve1 "}, {"MenuID": "+", "menuname": "Level Two navigation", "icon": "Icon-nav", "url": ". /findus/shop_retrieve1 "} ]} ]};
Easyui Enterprise Management System-combat seven navigation two