请问处理数据的函数那具体什么意思，没有看懂

script type="text/javascript'>
$(funciton(){
       $.ajaxSetup({
          url: "UserInfo.xml",
          type: "GET",
          dataType:"xml",
          timeout:1000,
          global:true,
           async:true,
           cache:true,
         });
        $("#btn1").click(function(){
                $.ajax({
                           success: function(data){
                               console.log(data);//请求响应后返回的数据
                                showData(data,"名字","name");
                            }
                })
        })
          $("#btn2").click(function(){
                $.ajax({
                           success: function(data){
                               console.log(data);
                                showData(data,"性别","sex");
                            }
                })
        })
         $("#btn3").click(function(){
                $.ajax({
                           success: function(data){
                               console.log(data);
                                showData(data,"邮编","email");
                            }
                })
        })
       //处理数据的函数
       showData ( d, n, v ) {
                 $("#divTip").empty();
                  var strHTML = "";
                  $(d).find("User").each(function(){
                        var $strUser = $(this);
                        strHTML += n +“：”+ $strUser.find(v).text()+"<hr>";
                 })
                $("#divTip").html(strHTML);
        }
})
</script>
<body>
<div class="divFrame">
       <div class="divTitle">
           <span><input id="Button1" type="button" value="姓名" class="btn"/></span>
           <span><input id="Button2" type="button" value="性别" class="btn"/></span>
           <span><input id="Button3" type="button" value="邮箱" class="btn"/></span>
       </div>
       <div class="divContent">
           <div id="divTip" class="clsShow"></div>
       </div>
</div>
</body>
UserInfo.xml

<?xml version = "1.0" encoding= "utf-8" ?>
<Info>
    <User id="1">
        <name>MGT360124</name>
        <sex>男</sex>
        <email>MGT360124@163.com</email>
    </User>
    <User id="2">
        <name>YSS</name>
        <sex>女</sex>
        <email>YSS360124@163.com</email>
    </User>
</Info>

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请问处理数据的函数那具体什么意思，没有看懂

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