Hi,
thanks Mike for your scripts, the 2nd works good for me.
I added it only for mobile :

// scroll to tabs
function scroll_down_script_2(){
?>
<script>
	if(window.outerWidth <= 990) {
		(function($){
		$(document).ready(function(){
		$('a.av-section-tab-title').click(function () {
		$('html, body').animate({
		scrollTop: $('.av-tab-section-container').offset().top
		}, 500);
		});
		});
		})(jQuery);
	}
</script>
<?php
}
add_action('wp_footer', 'scroll_down_script_2');