I have a navbar that is horizontal built using bootstrap. When I select a menu option, I want only the part below the navbar to refresh. So, say I select Menu 1, I want only the part below the bar to refresh

Questions
1. How can I achieve that?  

2. If I design a completely new page and have the navbar there, will it have same effect. 

[![enter image description here](https://i.stack.imgur.com/378b0.png)](https://i.stack.imgur.com/378b0.png)