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>