(function($){
	// Creating custom :external selector
	$.expr[':'].external = function(obj){
    	return !obj.href.match(/^mailto\:/) && (obj.hostname != location.hostname);
	};

	$(document).ready(function(){
		// After the document is ready, map all external links and
		// add a target attribute with _blank value.
		$('a:external').attr('target','_blank');
	});	
})(jQuery);