How to serialize and object to use as a parameter in a URL?

Hi,

I need to serialize an object in such a way that it can be passed as
parameter in a URL

http://www.domain.com?object=%d793btng....

I did some reading and I came to the conclusion that I need to create a
custom formatter and implements the IFormatter interface

the problem is that I don't quit know how to implements the
IFormatter.Serialize function

1.How do I get the attribute of each property?

2.How can i get all properties,i guess I need to use reflection?

2.How do I track the object which already Serialized(assuming the object
contains other objects)

Note that I cannot use binary formatter or other,since the code which do the
deserialization is a client side java script

thanks in advance.