// https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.5.9/slick.min.js
// //cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js

 $('.slider-for').slick({
   slidesToShow: 1,
   slidesToScroll: 1,
   arrows: false,
   fade: true,
   asNavFor: '.slider-nav'
 });
 $('.slider-nav').slick({
   slidesToShow: 3,
   slidesToScroll: 1,
   asNavFor: '.slider-for',
   dots: true,
   focusOnSelect: true
 });

 $('a[data-slide]').click(function(e) {
   e.preventDefault();
   var slideno = $(this).data('slide');
   $('.slider-nav').slick('slickGoTo', slideno - 1);
 });