Having a little issue with links

I'm trying to have a box link to different things depending on its state.

I made a small test thing and it seems to work except instead of going to the link in a new tab its adding it to the current address or whatever and returning a 404

How do I make it do what I want? Which is open the link in a new tab.

Link to test object http://learn.nwrc.ac.uk/_teldemo/Test/linktest/2/story.html

Test file attached.

Cheers.