WooCommerce: activate product tabs from URL

gistfile1.php

<?php
/**
 * wc_direct_link_to_product_tabs
 *
 * Allows you to create custom URLs to activate product tabs by default, directly from the URL
 * ex: http://mysite.com/my-product-name#reviews
*/
function wc_direct_link_to_product_tabs() {
	if( is_product() ) {
	?>
	<script type="text/javascript">
		jQuery(document).ready(function($) {
	
		    if( window.location.hash ) {
			    
			    // Vars
			    var tab 		= window.location.hash.replace('#', '');
			    var tab_content = 'tab-' + tab;
	
		    	// Tabs
		    	$( 'li.description_tab' ).removeClass( 'active' );
				$( 'li.' + tab + '_tab' ).addClass( 'active' );
				
				// Tabs content
				$( '#tab-description' ).hide();
				$( '#' + tab_content ).show();
			}
		
		    // when the tab is selected update the url with the hash
			$(".tabs a").click( function() { 
				window.location.hash = $(this).parent('li').attr("class").replace(' active', '').replace('_tab', '');
			});
	
		});
		</script>
	<?php
	}
}

add_action( 'wp_footer', 'wc_direct_link_to_product_tabs', 30 );