Open all external links in a new tab/window

external-links.js

// Wait until the DOM is fully loaded before executing the jQuery
$(document).ready(function($)	{

	// Lets open all external links in a new tab
	$.extend ($.expr[':'], {
		internal: function (e) {
		if (e.nodeName.toLowerCase() != 'a') {
				return false;
			}       
			var href = $(e).attr("href");
			if (href.match(/^http:\/\//)) {
				var parts = href.split('/');
				if (parts[2] !== location.host) {
					return false;
				}       
			}  
			if (href.match(/^mailto:/)) {
				return false;
			}       
			if (href.toLowerCase().match(/.(pdf|doc|xls|docx|xlsx)/)) {
				return false;
			}       
			return true;
		}
	});	
	$("a:not(:internal)").click (function (e) {
		window.open ($(this).attr("href"));
		e.preventDefault ();
		return false;
	});

});