问$.ajax()控件不输入成功或失败，但触发bug控制台，我得到的json响应确定

EN

{"d":[{"__type":"Treking.Data.Users.Owner","MembershipId":null,"FirstName":"siva","MobileNo":"9886811237","EmailId":"user@gmail.com","PhoneNo":""}]}

function GetInfo() {

        var checkboxInfo = $('#&lt%= chkboxContact.ClientID %&gt');
       var domcheckboxInfo=  checkboxInfo[0];
       if (domcheckboxInfo.checked == true) {

           $.ajax(
        {
            type: "Post",
            url: "../ProfileService.asmx/GetUserInfo",

            contentType: "application/json; charset=utf-8",
            dataType: "json",
            success: function (response) {
                var str = (typeof response.d) == 'string' ? eval('(' + response.d + ')') : response.d;
                for (var i = 0; i &lt str.length; i++) {
                    var firstname = str[i].FirstName;
                    var MobileNo = str[i].MobileNo;
                    var EmailId = str[i].EmailId;
                    var PhoneNo = str[i].PhoneNo;
                }
                $('#&lt%=txtboxContactperson.ClientID %&gt').text = firstname;
                $('#&lt%=txtboxEmailId.ClientID %&gt').text = EmailId;
                $('#&lt%=txtboxMobileNo.ClientID %&gt').text = MobileNo;
                $('#&lt%=txtboxTelephone.ClientID %&gt').text = PhoneNo;

            }, failure: function (response) {
                alert(response.d + "FAILED");
            }
        });



       }
    }

error: function(XMLHttpRequest, textStatus, errorThrown) {  
   alert("Status: " + textStatus); alert("Error: " + errorThrown); 
}