相信不少朋友在做导航条的时候感到很麻烦吧，因为每做一页，连接就要修改一次，页面多起来的时候简直就是折磨了。这种情况在使用js 的情况下会有所改善，因为每个连接都是一样的，并且以后有栏目修改，增加减少的时候会倍感方便。但使用手工修改的时候未免会出更多的麻烦，js 错一个字整个 js 都不能运行。

-I believe many of my friends to do the navigation bar at the time was very cumbersome, because each one to do, we should amend the connection once the page when it is grown has been tortured. Js in the use of such a situation the case will be improved, because each connection is the same, and after the program changes to reduce the time to increase more conveniently. However, the use of hand it will be revised when more trouble, js wrong word can not run the entire js.