Selecting multiple holes

[null object]

Hi,
Imagine I have a cube with some holes drilled in the top and some drilled in the bottom.

When I go to the top view I see the top holes as Solid black lines and I also see the bottom holes as dotted gray lines.

My problem is I have lots of holes on the top and bottom and when I want to work in the "Top" view I wish to select all the holes placed on the top view at once. So I use "Ctrl+A" but this selects all the bottom holes too.

Is there a way I can "select all" without picking up the objects on the bottom too?

[Tech3]

- select all regions in the view
- nudge selection to any side (only real regions will be nudged)
- nudge selection back

[null object]

Thank you very much.