Heyho everyone out there!

It may well be that this question has already come up and has been answered - if so, I apologise for wasting everyone's bandwidth.
I would like to have the target="_blank" tag inserted automatically into links which appear in articles - one reason is that I don't want the surfer to navigate away from my site and the second reason is that I find it far more convenient. Links in articles are invariable only pointing at extra info, which can be looked at and then the rest of the article is read.
Example:Normal link
Blank Target Link
Has this issue been raised before?
Thanks in advance,
Nils.