Raffle

var a = $('.full-attendee-list li');
var b = $(a[Math.floor((Math.random() * a.length) + 1) - 1]);

b.siblings().mouseleave().css({border: 'none'});
b.css({border: '7px dotted red'}).mouseenter();
$('html,body').animate({scrollTop: (b.offset().top - 300) + 'px'}, 'fast');