var facebookApi = {};
	facebookApi.scope = {};
	facebookApi.initialize = function($scope) { 
		if($scope) facebookApi.scope = $scope;
	}

	facebookApi.login = function(loginFunction,cancelFunction)
	{
		 FB.login(function(response) {
		   if (response.authResponse) loginFunction();
		   else cancelFunction();
		 }, facebookApi.scope);
	}

	facebookApi.logout = function() {
		FB.logout();
	}