Angular: Empty Fiddle

http://angularjs.org/

HTML

<script src="http://code.angularjs.org/angular-1.0.1.js"></script>
<div ng-controller="MyCtrl">
	<div class="col text-center">
		<button class="button b3" ng-click="toggle = !toggle">{{toggleText}}</button>
	</div>
</div>

JavaScript

var myApp = angular.module('myApp',[]);

function MyCtrl($scope) {
	$scope.toggleText = 'click me'
	$scope.toggle = true
	$scope.$watch('toggle', function(){
		$scope.toggleText = $scope.toggle ? 'Ver fotos' : 'Ver caracterĂ­sticas';
	})
}