text: 
  //back to top
  let backTopBtn = document.querySelector('.back-top')
  window.addEventListener('scroll',() =>{
    if (document.body.scrollTop > 20 || document.documentElement.scrollTop > 20) {
      backTopBtn.style.opacity = "1";
    } else {
      backTopBtn.style.opacity = "0";
    }
  })
  //fixed header
  window.onscroll = function() {fixedHeaderFunction()};
  var header = document.querySelector("#header-bottom");
  var sticky = header.offsetTop;
  function fixedHeaderFunction() {
    if (window.pageYOffset > sticky) {
      header.classList.add("sticky-header");
    } else {
      header.classList.remove("sticky-header");
    }
  }
  //EXPERT TESTIMONIAL
  
  $(document).ready(function(){
    $('.expert-testimonial').slick({
      dots: false,
      infinite: true,
      speed: 300,
      slidesToShow: 4,
      slidesToScroll: 1,
      prevArrow: ".arrow-prev",
      nextArrow: ".arrow-next",
      autoplay: true,
      autoplaySpeed: 2000,
      responsive: [
        {
          breakpoint: 1199.98,
          settings: {
            slidesToShow: 3,
            slidesToScroll: 1,
            infinite: true,
            dots: false
          }
        },
        {
          breakpoint: 991.98,
          settings: {
            slidesToShow: 2,
            slidesToScroll: 1
          }
        },
        {
          breakpoint: 767.98,
          settings: {
            slidesToShow: 1,
            slidesToScroll: 1
          }
        }
      ]
    });
  }); 
  