js 鼠标点击页面出现文字

<script type="text/javascript">
    var a_idx = 0;
    jQuery(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>