how to change number visible columns in table

Hi expert,

I have comboBox and Table( Commons). Based on comboBox value which I selected that many columns will visible in my Table and reaming will appear when scrolled. how to achieve that?

eg: If i selected 2 in comboBox, the total visible rows in my table is 2

                    Column1   column2

row1

row2

row3

Thanks,

Ashok.