AngularJS Example Plunkr

function Ctrl($scope) {
}

<!DOCTYPE html>
<html ng-app="">

<head>
  <script data-require="jquery@2.1.3" data-semver="2.1.3" src="http://code.jquery.com/jquery-2.1.3.min.js"></script>
  <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.0.5/angular.min.js"></script>
  <script src="script.js"></script>
  <style>
    .activated {
      border: 1px solid blue;
    }
  </style>
</head>

<body>
  <div ng-controller="Ctrl">
    <a ng-click="showimage = true" ng-class="{ 'activated': showimage}" class="button">Images</a>
    <a ng-click="showimage = false" ng-class="{ 'activated': !showimage}" class="button">Details</a>
  </div>
</body>

</html>