AngularJS 02

<script src="http://code.angularjs.org/angular-1.0.1.min.js"></script><div ng-app="Ng">    <div supermanss></div>    <div enter="panel" leave>鼠标移入移出</div></div><script>    var ng = angular.module("Ng", []);    ng.directive("supermanss", function () {        return { restrict: "A", link: function () { alert("Hello")} };    })    ng.directive("enter", function(){return function (scope,element,attr) {        element.bind("mouseenter", function () {            // element.addClass("panel");            element.addClass(attr.enter);        })    }    })    ng.directive("leave", function () {        return function (scope, element, attr)        {            element.bind("mouseleave", function () {                // element.removeClass("panel");                element.removeClass(attr.enter);            })        }    })</script>