How to add new row to the table and copy

HI EXPERTS,

CAN ANYONE HELP IN THIS REQUIREMENT...

I have one table with some rows. where user click ADD button one new row has to create at first row...

and another one when user select one row and when he click on COPY button one row need to add after the selected row with same data???

anyone help me how to do this??

Thanks and Regards,

kriss