subform/table to contain scroll

HI ,

I have a table which have 6 rows by default but when i click the radio button the data will be populated in to subform/table,  if the data that i am getting from Data base contains more tha 6 rows then the table has to be increased but the table must not flowed down. the subform or table must be postion

in a text field if the charecter exceed automatically scroll will appear in the same way here for table it shoul happen

EX: BY clicking radio buttons data has 10 rows then i should get the scroll bar of subform/table in order to see all the rows .

please let me know how could i do it.

thanks in advance...