有点不明白？？
<script type="text/javascript">
            $(function () {
                $("#btnShow").bind("click", function () {
                    var $this = $(this);
                    $.getScript("http://www.imooc.com/data/sport_f.js",function(){
                        $this.attr("disabled", "true");//????
                    });
                })
            }); 
        </script>