text: // **************************************
  // ***     Designed And Developed     ***
  // **               By                ***
  // ***          Kevin Banza           ***
  // **************************************
  
  const nav_benefits = document.querySelector('#navbtn-benefits');
  const nav_zintec = document.querySelector('#navbtn-zintec');
  const nav_contact = document.querySelector('#navbtn-contact');
  const nav_home = document.querySelector('#navbtn-home');
  const contactResultbtn = document.querySelector('#contactResult-btn');
  const section_benefits = document.querySelector('#benefits');
  const section_zintec = document.querySelector('#zintec');
  const section_contact = document.querySelector('#contact');
  const section_contactResult = document.querySelector('#contactResult');
  const section_home = document.querySelector('#home');
  console.log('Website Made By Kevin Banza');
  console.log('Kevin Banza : http://kevinbanza.com/');
  
  setActive(section_home, nav_home);
  
  function removeClass(target, classToRemove) {
      if (target.classList.contains(classToRemove)) {
          target.classList.remove(classToRemove);
      }
  }
  
  function addClass(target, classToRemove) {
      if (!target.classList.contains(classToRemove)) {
          target.classList.add(classToRemove);
      }
  }
  
  function setActive(target, nav) {
      removeClass(section_home, 'active');
      removeClass(section_benefits, 'active');
      removeClass(section_zintec, 'active');
      removeClass(section_contact, 'active');
      removeClass(section_contactResult, 'active');
      addClass(target, 'active');
      if (nav != null) {
          setNavActive(nav);
      }
  }
  
  function setNavActive(target) {
      removeClass(nav_home, 'active');
      removeClass(nav_benefits, 'active');
      removeClass(nav_zintec, 'active');
      removeClass(nav_contact, 'active');
      addClass(target, 'active');
  }
  
  
  nav_home.addEventListener('click', function(e) {
      setActive(section_home, nav_home);
  });
  nav_benefits.addEventListener('click', function(e) {
      setActive(section_benefits, nav_benefits);
  });
  nav_zintec.addEventListener('click', function(e) {
      setActive(section_zintec, nav_zintec);
  });
  nav_contact.addEventListener('click', function(e) {
      setActive(section_contact, nav_contact);
  });
  contactResultbtn.addEventListener('click', function(e) {
      setActive(section_contact, nav_contact);
  });