$user = JFactory::getUser();
$groups = $user->get('groups');
foreach($groups as $group){
if ($group=="4") {
echo '<script>
jQuery(document).ready(function(){
jQuery("[id="bfSubmitButton"]").prop("onclick",null).off("click");
jQuery("#bfSubmitButton").on("click", function(){
       window.history.back();
 });
});
</script>';
}}