title: How to include html file by clicking button
body: <p>I have 4 buttons and each of them must to include html file inside my index.html</p>
  
  <p>My buttons:</p>
  
  <pre><code>&lt;div class="btn-group btn-group-lg"&gt;
  
                          &lt;button type="button" class="btn btn-primary" ng-click="changePage2Content('page2page1.html')"&gt;
                              Chapter 1
                          &lt;/button&gt;
  
                          &lt;button type="button" class="btn btn-primary" ng-click="changePage2Content('page2page2.html')"&gt;
                              Chapter 2
                          &lt;/button&gt;
  
                          &lt;button type="button" class="btn btn-primary" ng-click="changePage2Content('page2page3.html')"&gt;
                              Chapter 3
                          &lt;/button&gt;
  
                          &lt;button type="button" class="btn btn-primary" ng-click="changePage2Content('page2page4.html')"&gt;
                              Chapter 4
                          &lt;/button&gt;
  
                      &lt;/div&gt;
  </code></pre>
  
  <p>My js:</p>
  
  <pre><code>&lt;script cam-script type="text/form-script"&gt;
                  inject(['$scope',function($scope){
                      $scope.url = '';
                      function changePage2Content(path)
                      {
                          $scope.url = path;
                      }
                  }]);
              &lt;/script&gt;
  </code></pre>
  
  <p>And my div which must show included file:</p>
  
  <pre><code>&lt;div class="row" ng-include='url'&gt;
  &lt;/div&gt;
  </code></pre>