js运行出undefined，求解

var obj = $("#awesome");
                obj.data("name", "CodePlayer");
                obj.data("desc", "专注于编程开发技术分享");
                obj.data("url", "http://www.);

                alert(obj.data('url'));

下面是body的div
       <div id="awesome" data-options="width:30,height:50" ></div>