怎样获取ng-change事件的当前元素

Question

angular中操作dom元素，ng-click可通过 $event获取<input id="dd" type="text" class="form-control"            ng-click="showMenu($event)" ng-model="dept.name" readonly>、 scope.showMenu = function (event) {     console.log($(event.target).attr('id'));                                                 $(event.target).next().css({left:15+'px', top:34+'px',display:      "block"}).slideDown("fast");                                                                  }ng-change怎么获取？