how to make added row visible in atable

hi

i have atable with visible rowcount=5 when i click on add button anew row is added to table,that added row isby default not visible it is below 5 th row, what i want is, as soon as user clicks on add row, 6th row seen in place of 5th row,similarly 5th in place of 4th...............2nd row instead of 1st.can u please explain code for this scenario.

thanks

kishore