$(document).ready(function() {
	$('.intro_copy a, .useful_links a').filter(function() {
		var shouldIgnoreLink = $(this).hasClass('no-external-icon') ? true : false;
		return this.hostname && this.hostname !== location.hostname && shouldIgnoreLink == false;
	}).before(' <img src="/sites/all/themes/yf/images/external.png" alt="Link to an external website" class="favicon">');
});