Angular:

http://angularjs.org/

by mrajcok

HTML

<div ng-controller="MainCtrl">
  status = {{status}}
    <div ng-controller="AppCtrl">
    </div>
</div>

JavaScript

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

//myApp.directive('myDirective', function() {});
//myApp.factory('myService', function() {});

function MainCtrl($scope) {
    $scope.status = 'old status';
    $scope.updateStatus = function(newStatus) {
           $scope.status = newStatus;
    }
}

function AppCtrl($scope) {
    $scope.updateStatus('new status');
}