jQuery add target="_blank" for outgoing link

Question

I need some help to create jquery script :)
I have some of link like this on my HTML.

<a href="http://google.com">Google</a> <a href="/">Home</a> <a href="http://www.gusdecool.com/">Home</a> <a href="contactus.html">Contact Us</a> 

And now i want jQuery to check all of the link on my page. if that link is outside of my server (my server is gusdecool.com). Then add target="_blank". and the result will be like this

<a href="http://google.com" target="_blank">Google</a> <a href="/">Home</a> <a href="http://www.gusdecool.com/">Home</a> <a href="contactus.html">Contact Us</a> 

Answer 1

assuming that all external links will start with http:// you could do this:

$('a[href^="http://"]').not('a[href*=gusdecool]').attr('target','_blank');

Answer 2

$('a').each(function() {    var a = new RegExp('/' + window.location.host + '/');    if (!a.test(this.href)) {       $(this).attr("target","_blank");    } }); 

This was from css-tricks.com, seems to work pretty well.