Angular: Empty Fiddle
http://angularjs.org/
HTML
<script src="http://code.angularjs.org/angular-1.0.1.js"></script>
<div ng-controller="MyCtrl">
Hello, {{name}}!
<input type="checkbox" ng-model="student.isSelected"/>
<button ng-disabled="!student.isSelected" >enable/disable</button>
</div>
JavaScript
var myApp = angular.module('myApp',[]);
function MyCtrl($scope) {
$scope.name = 'Superhero';
$scope.student = {isselected: false};
}