I want to creat list a master form with two subs forms:
i created a custom list name list 1 and this the master
i created a custom list in datasheet view name list name lists 2 and the the
first sub form of master
i created a custom list in datasheet view name list name lists 3 and the the
second sub form of master

i created aspx with share point desginer and i added list 1 and list 2
and list 3 to it
the list 1 (master ) added as a custom webpart as for a new item.
the list 2 (sub1 ) added as normal webpart
the list 3 (sub2 ) added as normal webpart

i have a colum name: id in list 2 and list 3.

i want when the user open this aspx file fill the master form then fill the
sub 1 and sub 2
the problem is i want replicate the sub 1 and 2 wiht master form id
how i can do it ::i mean i want to add master form id to id colum in sub 1
and 2 automaticly.
thanks.