Code Snippet: Open External Links In New Window

You can do this straight with HTML, but that is invalid markup, this takes care of business without invalid code and unnecessary markup.

$('a').each(function() {

   var a = new RegExp('/' + window.location.host + '/');

   if(!a.test(this.href)) {

       $(this).click(function(event) {

           event.preventDefault();

           event.stopPropagation();

           window.open(this.href, '_blank');

       });

   }

});