jquery 点击页面流畅弹出预定文字

js代码：

 <script src="https://cdn.bootcss.com/jquery/2.2.1/jquery.min.js"></script>
 <script type="text/javascript">
   var a_idx = 0;
   $(document).ready(function ($) {
     $("body").click(function (e) {
       var a = new Array("富强", "民主", "文明", "和谐", "自由", "平等", "公正", "法治", "爱国", "敬业", "诚信", "友善");
       var $i = $("<span/>").text(a[a_idx]);
       a_idx = (a_idx + 1) % a.length;
       var x = e.pageX,
         y = e.pageY;
       $i.css({
         "z-index": 999999999999999999999999999999999999999999999999999999999999999999999,
         "top": y - 20,
         "left": x,
         "position": "absolute",
         "font-weight": "bold",
         "color": "#ff6651"
       });
       $("body").append($i);
       $i.animate({
         "top": y - 180,
         "opacity": 0
       }, 1500, function () {
         $i.remove();
       });
     });
   });
 </script>