Angular: Empty Fiddle

http://angularjs.org/

HTML

<div ng-controller="MyCtrl">
<input type="radio" ng-model="value" value="foo" ng-change='newValue(value)'>
<input type="radio" ng-model="value" value="bar" ng-change='newValue(value)'>
<input type="radio" ng-model="value" value="baz" ng-change='newValue(value)'>    
<hr> 
{{value}}
</div>

JavaScript

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

function MyCtrl($scope) {
    $scope.value = 'foo';

    $scope.newValue = function(value) {
        $scope.value = value;
    }
}