[jQuery] How to access the member of $.each() when Key has space?

[jQuery] How to access the member of $.each() when Key has space?


I using JQuery to call back asp.net web service,
The web service is simple, only query from SQL Server and return
result as JSON.
everythings is cool.
Only problem is the key of dictionary after Deserialization by eval()
method,It cannot access.
For example:
$.each(eval(response),function(key, item) {
alert(item.Account); //Work
alert(item.Amount); //Work
alert(item.Reference Date); //Fail
});
I have try
alert(item('Reference Date'));
alert(item['Reference Date']);
alert(item[0]); //Assume it is on index 0
all of them are not work.
in depth, the key of dictionary is generate by the DataTable column
name, so i would to fix it on program layer rather them change the
database structure.
I have upload a screen shot who take from IE8 develop tool to
visualize the problem.
it show the code and local variable.
http://a.imagehost.org/0446/untitled.jpg