原谅我真的搞不懂老师写的这串代码的逻辑

Question

 <script type="text/javascript">             $(function () {                 $.ajaxSetup({                     type:"POST",                 success:function(data){                         $("ul").append("<li>你输入的<b>  "                             + $("#txtNumber").val() + " </b>是<b> "                             + data + " </b></li>");                     }                 });                 $("#btnShow_1").bind("click", function () {                     $.ajax({                         data: { num: $("#txtNumber").val() },                         url: "http://www.imooc.com/data/check.php"                     });                 })                 $("#btnShow_2").bind("click", function () {                     $.ajax({                         data: { num: $("#txtNumber").val() },                         url: "http://www.imooc.com/data/check_f.php"                     });                 })             });         </script>第一个函数和两个按钮的函数有什么关联性

Answer 1

ajaxSetup这个方法是jq给ajax方法设置默认，下面两按钮ajax方法没有配置的type,success回调上面都已经配置了，也就是下面两个按钮的ajax是post请求，成功回调是

success:function(data){

                        $("ul").append("<li>你输入的<b>  "

                            + $("#txtNumber").val() + " </b>是<b> "

                            + data + " </b></li>");

                    }