title: How to change page and maintain the nav bar
body: <p>i wrote a html script with a simple navbar. The main page is fine but when i click on "About" the page reload and i just want to reload the content and maintain the navbar. I'm using bootstrap. How can i do this?</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html lang="en"&gt;
  &lt;head&gt;
    &lt;title&gt;Bootstrap Example&lt;/title&gt;
    &lt;meta charset="utf-8"&gt;
    &lt;meta name="viewport" content="width=device-width, initial-scale=1"&gt;
    &lt;link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"&gt;
    &lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"&gt;&lt;/script&gt;
    &lt;script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"&gt;&lt;/script&gt;
  &lt;/head&gt;
  &lt;body&gt;
  &lt;nav class="navbar navbar-inverse" ng-controller="HeaderController"&gt;
    &lt;div class="container-fluid"&gt;
      &lt;div class="navbar-header"&gt;
        &lt;button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar"&gt;
          &lt;span class="icon-bar"&gt;&lt;/span&gt;
          &lt;span class="icon-bar"&gt;&lt;/span&gt;                        
        &lt;/button&gt;
        &lt;a class="navbar-brand" href="#"&gt;Logo&lt;/a&gt;
      &lt;/div&gt;
      &lt;div class="collapse navbar-collapse" id="myNavbar"&gt;
        &lt;ul class="nav navbar-nav"&gt;
          &lt;li class="active"&gt;&lt;a href="#"&gt;Home&lt;/a&gt;&lt;/li&gt;
          &lt;li&gt;&lt;a href="file:///path/about.html"&gt;About&lt;/a&gt;&lt;/li&gt;
          &lt;li&gt;&lt;a href="#"&gt;Contact&lt;/a&gt;&lt;/li&gt;
        &lt;/ul&gt; 
      &lt;/div&gt;
    &lt;/div&gt;
  &lt;/nav&gt;
  &lt;div class="container"&gt;
    &lt;!-- &lt;form class="form-horizontal" action="/action_page.php"&gt; --&gt;
    &lt;div class="row"&gt;
      &lt;div class="col-*-10"&gt;
        &lt;legend&gt;&lt;h2&gt;Title&lt;/h2&gt;&lt;/legend&gt;
      &lt;/div&gt;
    &lt;/div&gt;
    &lt;p&gt;HOME!!!&lt;/p&gt;
  &lt;/div&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>And this is my about page:</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html lang="en"&gt;
  &lt;head&gt;
    &lt;title&gt;Bootstrap Example&lt;/title&gt;
    &lt;meta charset="utf-8"&gt;
    &lt;meta name="viewport" content="width=device-width, initial-scale=1"&gt;
    &lt;link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"&gt;
    &lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"&gt;&lt;/script&gt;
    &lt;script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"&gt;&lt;/script&gt;
  &lt;/head&gt;
  &lt;body&gt;
    &lt;p&gt;ABOUT!!!!!!!!!!!!!!!!!&lt;/p&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>