AngularJS: Checkbox with default values (ng-true-value)

http://angularjs.org/

HTML

<script src="http://code.angularjs.org/angular-1.0.0rc8.js"></script>
<div ng-controller="MyCtrl">
         <input type="checkbox"
    ng-model="selection"
    ng-true-value="enabled=200"
    ng-false-value="disabled">
    {{selection}} ---------- {{enabled}}
</div>

JavaScript

function MyCtrl($scope) {
    $scope.selection = 'enabled';
    $scope.enabled=''
}