Wordpress : How to make link that open in a new tab automatically?

Hi guys, so i have a problem about my wordpress blog.
I'm currently using a plugin that disable text-selection and even disable right clicking. But then i realize, if i do this people can't open link to the new tab because they can't right-cliking. So then i think, is there a way to make the links on my site that can open in a new tab when they do left-clicking?

add this in your head tag

<base target="_blank" />

mrsix said:

add this in your head tag

<base target="_blank" />

Click to expand...

great! thanks, it working

...or http://wordpress.org/extend/plugins/wp-external-links/.