Allow B2B to navigate through the form with Tab

With
$('#company').blur(function(){
VAT only appears when we leave the input and therefore does not allow to navigate through the form with Tab

With
$('#company').on('input',function(){
that work

themes/default/address.tpl

@@ -48,7 +48,7 @@ $(function(){ldelim}
 {rdelim});
 {literal}
 	$(document).ready(function() {
-		$('#company').blur(function(){
+		$('#company').on('input',function(){
 			vat_number();
 		});
 		vat_number();