ant1vit

function testJump(x){
    var ml = ~~x.getAttribute('maxlength');
    if(ml && x.value.length >= ml){
        do{
            x = x.nextSibling;
        }
        while(x && !(/text/.test(x.type)));
        if(x && /text/.test(x.type)){
            x.focus();
        }
    }
}

<div>
    <input type="text" onkeyup="testJump(this);" maxlength="2" size="2">
    <input type="text" onkeyup="testJump(this);" maxlength="3" size="3">
    <input type="text" onkeyup="testJump(this);" maxlength="7" size="7">
  
</div>

$('.controller').on('click', function(){
            $this = $(this);
            $target = $this.siblings('.tall').eq(0);
            if($this.hasClass('less')){
                $target.animate({
                    height: xpander_init+'px',
                }, function(){
                    $this.removeClass('less').addClass('more');
                    $this.find('span').text('Подробнее');
                    $this.trigger('scrollto');
                });

            }else if($this.hasClass('more')){
                $target.animate({
                    height: $target.data('init-hg')+'px',
                }, function(){
                    $this.removeClass('more').addClass('less');
                    $this.find('span').text('Скрыть');
                    $this.trigger('scrollto');
                });
            }
            return false;
        }).on('scrollto', function(){
            $('body, html').animate({
                scrollTop: $(this).offset().top -
                           (window.innerHeight - $this.height()*2),
            }, 600);
        });