Triger for display next record in oracle forms

hai all,
i want to do
when new form opened i have to add new reord that is empty new form also my new rownum will be displayed.
now i getting first record.
like:
GROUP_ROWNUM:     1
GROUP_ID:      120130
GROUP_NAME aaaaaaaaa
need like:
GROUP_ROWNUM:     7
GROUP_ID:
GROUP_NAME
that can be done by
trigger for display next record in oracle forms?
or through property seting?
thanks in adv,
rcs
--------

YES, this block is base on the DB table
through defualt navigational button i can go to next,last,new record
but i want create seperate form for new entry, in that i want to display
old rownum
formula to get rownum automatically (i am not at all typing it is system generated)
even though i created column group_rownum for rownum
(i can't be typing)
LAST_RECORD;
NEXT_RECORD; also not getting the next rownum
i hope now understand me
any posible way?
thank you for your good input
i.e.
SQL> DESC GROUP_MSTR1;
Name Null? Type
GROUP_ID NOT NULL NUMBER(10)
GROUP_NAME NOT NULL VARCHAR2(30)
SQL> select * from GROUP_MSTR1;
GROUP_ID GROUP_NAME
123 AAAAAA
124 BBBBBBBB
125 CCCCCCCCC
126 DDDDDDDD
1 eeeeeeee
2 FFFFFFFFF
3 ggggggg
7 rows selected.
SQL> select rownum, GROUP_ID, GROUP_NAME from GROUP_MSTR1;
ROWNUM GROUP_ID GROUP_NAME
1 123 AAAAAA
2 124 BBBBBBBB
3 125 CCCCCCCCC
4 126 DDDDDDDD
5 1 eeeeeeee
6 2 FFFFFFFFF
7 3 ggggggg
7 rows selected.
-------------

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