点赞+1特效

<span id="btn"><i class="iconfont">&#xe602;</i> 点击</span>

<script src="js/jquery.min.js" type="text/javascript"></script>
<script type="text/javascript">
(function ($) {
    $.extend({
        tipsBox: function (options) {
            options = $.extend({
                obj: null, //jq对象，要在那个html标签上显示
                str: "+1", //字符串，要显示的内容;也可以传一段html，如: "<b style='font-family:Microsoft YaHei;'>+1</b>"
                startSize: "12px", //动画开始的文字大小
                endSize: "30px",  //动画结束的文字大小
                interval: 600, //动画时间间隔
                color: "red",  //文字颜色
                callback: function () { }  //回调函数
            }, options);
            $("body").append("<span class='num'>" + options.str + "</span>");
            var box = $(".num");
            var left = options.obj.offset().left + options.obj.width() / 2;
            var top = options.obj.offset().top - options.obj.height();
            box.css({
                "position": "absolute",
                "left": left + "px",
                "top": top + "px",
                "z-index": 9999,
                "font-size": options.startSize,
                "line-height": options.endSize,
                "color": options.color
            });
            box.animate({
                "font-size": options.endSize,
                "opacity": "0",
                "top": top - parseInt(options.endSize) + "px"
            }, options.interval, function () {
                box.remove();
                options.callback();
            });
        }
    });
})(jQuery);
function niceIn(prop){
    prop.find('i').addClass('niceIn');
    setTimeout(function(){
        prop.find('i').removeClass('niceIn');    
    },1000);        
}
$(function () {
    $("#btn").click(function () {
        $.tipsBox({
            obj: $(this),
            str: "+1",
            callback: function () {
            }
        });
        niceIn($(this));
    });
});
</script>

网上找的，留着备用吧。