How can I access Sales Lines against of Sales Header in Web?

SHIV_DYN
edited 2010-03-15 in NAV Three Tier
Hi everyone,
Using with “Sales Document no.“ I want to bind the sales Lines data in to Grid View Control.
But I am not able to put a filter (I mean to say, there is no field called Document no. and Document Type in Sales Line service). Could anyone help me out, by providing the related documents or website URL’s.
Thanks & Regards,
Shiv