用jquery的ajax方法,从客户端post数据到服务器段。如何避免数据的序列化有关问题

用jquery的ajax方法,从客户端post数据到服务器段。如何处理数据的序列化问题
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>

    <script src="jquery-1.3.2.js" type="text/javascript"></script>

    <script src="jquery.json-2.2.js" type="text/javascript"></script>
    <script type="text/javascript" language="javascript">
        $(document).ready(function() {
            $("#Text1").click(function() {
                $.ajax({
                    type: "POST",
                    contentType: "application/json; charset=utf-8",
                    url: "WebService.asmx/HelloWorld",
                    data: "{}",
                    dataType: "json",
                    success: function(data) { displayResult(data); }
                })
            }
                );
            function displayResult(data) {

                alert(data.d);
            }
                      var vobj = {
                _type: "Person",
                name: "Hugo",
                age: 23,
                address: {
                    country: "china"
                }
            }
            $("#Button1").click(function() {
                $.ajax({
                    type: "POST",
                    url: "Default.aspx",
                    dataType: "json",
                    data:$.toJSON(vobj)
                   
                })
            });

        });

          
    
          
           
       
    </script>

</head>
<body>
    <div>
        <input id="Text1" type="text" /></div>
    <input id="Button1" type="button" value="button" />
</body>
</html><br/>
得到的结果如下:Request.Form[0]="{"_type":"Person", "name":"Hugo", "age":23, "address":{"country":"china"}}“<br/>