flex实现树状网络布局，可以灵活的添加，删除节点，收缩展开子节点，功能可扩展，可以-flex tree network topology to achieve the flexibility to add, delete node, expand the child nodes shrink, the function can be extended

全DIV＋CSS布局，修改界面只需修改一个CSS文件即可，优势不说了，google 一下就有了。根据多年企业建站经验，不敢说这个系统功能有多强大，但是肯定合适和中小企业建站。 -The whole DIVCSS layout, modify the interface only need to modify a CSS file, the advantage is not to say, you will have a google. According to the experience