Hide and Show the lines conditionally

Hi all,

I'm using a tablular format report and i placed relevant tags into each column. When i run the report there will be a line below for each and every row but i want to avoid these lines below each row on a condtion basis.

My data row will have both detail lines and subtotal. I want to show a line above and below the total lines but not for the detail lines.

Note: Detail lines and Total lines are retrieved from the same tag node. I am not looking for underline for the fields but a complete line for entire row.