angular.js keyevents for everywhere

keydown.js

.directive('onKeydown', ['$parse',function($parse) {
  return function(scope, elm, attrs) {
    var keydownFn = $parse(attrs.onKeydown);
    elm.bind("keydown", function(event) {
      scope.$apply(function(){
      	keydownFn(scope, { '$event': event });
      });
    });
  };
}]);