Add a link to BrowseHappy to the header of your Genesis Child theme if the visitor is using Internet Explorer 8 or below.

functions.php

add_action( 'genesis_before', 'craigsimps_browsehappy' );
/**
 * Show the browsehappy link 
 * if browser is less than IE8
 */
function craigsimps_browsehappy() {
?>
<!--[if lt IE 8]>
	<p class="browserupgrade">You are using an <strong>outdated</strong> browser. Please <a href="http://browsehappy.com/">upgrade your browser</a> to improve your experience.</p>
<![endif]-->
<?php
}