JSON对象返回值但显示未定义

我正在从数据库中选择数据并将其返回到json对象中，但是当我尝试访问对象的属性时，它们显示为undefined，但是如果我查看返回的对象，则使用Mozilla的firebug或内置的Chromes web开发工具，对象的属性有值，

I'm selecting data from a database and returning it in a json object, but when i try to access the object's properties they display undefined, but if i look at the object being returned, either using Mozilla's firebug or Chromes built in web dev tools, the object's properties have values,

$.getJSON("info.php", {uid:one}, function(data){
        var size = $(data).size();
        console.log(data);
        //display systems
        $(child).append('<tr><th height="20" colspan="2">Contact Person</th><th height="20">Contact Number</th><th height="20" colspan="2">E-mail</th></tr><tr><td colspan="2">'+data.contact_person+'</td><td>0'+data.contact_number+'</td><td colspan="2">'+data.email_address+'</td></tr>');

        child.show();
        loader.hide();

    });

非常感谢任何帮助。

以下是chrom如何显示它（我用-----替换敏感数据）：

Here's how chrom displays it (i've replaced sensitive data with "-----"):

[
Object

bee：undefined

bwo：undefined

cell_number：---

city：---

company_name：----

contact_number：----

contact_person：


date：2010-10- 18

email_address：-----

esco_number：-------


fax_number：0

fgn：undefined

lbs：undefined

none：undefined

数字：761

其他：undefined

pobox：------

postal_city：------

postal_code ：-----

postal_postal_code：-----

postal_province：---------

postal_suburb：--------

省：-------


same_as_physical：


smee ：undefined

状态：有效

街道：--------

郊区：----- -----结果
时间：11:36:21

uid：----------

网站：


proto ：对象

]

[ Object
bee: "undefined"
bwo: "undefined"
cell_number: "---"
city: "---"
company_name: "----"
contact_number: "----"
contact_person: ""
date: "2010-10-18"
email_address: "-----"
esco_number: "-------"
fax_number: "0"
fgn: "undefined"
lbs: "undefined"
none: "undefined"
number: "761"
other: "undefined"
pobox: "------"
postal_city: "------"
postal_code: "-----"
postal_postal_code: "-----"
postal_province: "---------"
postal_suburb: "--------"
province: "-------"
same_as_physical: ""
smee: "undefined"
status: "Active"
street: "--------"
suburb: "----------"
time: "11:36:21"
uid: "----------"
website: ""
proto: Object
]

//尝试访问chrome控制台中的数据

Object.pobox

undefined

// trying to access the data in chrome's console
Object.pobox
undefined

//这里是console.dir：

数组[1]

0：对象

bee：

bwo：


cell_number：123456789

city： Bathurst

company_name：test

contact_number：123456789

contact_person：test

date：2011- 03-22

email_address：test@test.test

esco_number：010101

fax_number：123456789

fgn：


lbs：

无：


数字：01

其他：

pobox：0

postal_city：


postal_code：0

postal_postal_code：0

postal_province：


postal_suburb：


省份：东开普省

same_as_physical：on

smee：

状态：有效
街道：测试

郊区：测试

时间：10:09:04

uid：0

网站：test.co.za

proto ：对象

长度：1

proto ：数组[0]

// here's console.dir:
Array[1]
0: Object
bee: ""
bwo: ""
cell_number: "123456789"
city: "Bathurst"
company_name: "test"
contact_number: "123456789"
contact_person: "test"
date: "2011-03-22"
email_address: "test@test.test"
esco_number: "010101"
fax_number: "123456789"
fgn: ""
lbs: ""
none: ""
number: "01"
other: ""
pobox: "0"
postal_city: ""
postal_code: "0"
postal_postal_code: "0"
postal_province: ""
postal_suburb: ""
province: "Eastern Cape"
same_as_physical: "on"
smee: ""
status: "Active"
street: "test"
suburb: "test"
time: "10:09:04"
uid: "0"
website: "test.co.za"
proto: Object
length: 1
proto: Array[0]