Make external links open in new browser window/tab (from http://css-tricks.com/snippets/jquery/open-external-links-in-new-window/ )

functions.js

/***** Make external links open in new browser window/tab *****/
$('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' );
		});
	}
});