mixin NavbarScript 
  if hasTopNavOnly
    script.
      var navbarPosition = localStorage.getItem('navbarPosition');
      var navbarTop = document.querySelector('[data-layout] .navbar-top:not([data-double-top-nav');
      var navbarDoubleTop = document.querySelector('[data-double-top-nav]');
      
      if (localStorage.getItem('navbarPosition') === 'double-top') {
        document.documentElement.classList.toggle('double-top-nav-layout');
      }

      if (navbarPosition === 'double-top') {
        navbarDoubleTop.removeAttribute('style');
        navbarTop.remove(navbarTop);
      } else {
        navbarTop.removeAttribute('style');
        navbarDoubleTop.remove(navbarDoubleTop);
      }
  else 
    script.
      var navbarPosition = localStorage.getItem('navbarPosition');
      var navbarVertical = document.querySelector('.navbar-vertical');
      var navbarTopVertical = document.querySelector('.content .navbar-top');
      var navbarTop = document.querySelector('[data-layout] .navbar-top:not([data-double-top-nav');
      var navbarDoubleTop = document.querySelector('[data-double-top-nav]');
      var navbarTopCombo = document.querySelector('.content [data-navbar-top="combo"]');
      
      if (localStorage.getItem('navbarPosition') === 'double-top') {
        document.documentElement.classList.toggle('double-top-nav-layout');
      }

      if (navbarPosition === 'top') {
        navbarTop.removeAttribute('style');
        navbarTopVertical.remove(navbarTopVertical);
        navbarVertical.remove(navbarVertical);
        navbarTopCombo.remove(navbarTopCombo);
        navbarDoubleTop.remove(navbarDoubleTop);
      } else if (navbarPosition === 'combo') {
        navbarVertical.removeAttribute('style');
        navbarTopCombo.removeAttribute('style');
        navbarTop.remove(navbarTop);
        navbarTopVertical.remove(navbarTopVertical);
        navbarDoubleTop.remove(navbarDoubleTop);
      } else if (navbarPosition === 'double-top') {
        navbarDoubleTop.removeAttribute('style');
        navbarTopVertical.remove(navbarTopVertical);
        navbarVertical.remove(navbarVertical);
        navbarTop.remove(navbarTop);
        navbarTopCombo.remove(navbarTopCombo);
      } else {
        navbarVertical.removeAttribute('style');
        navbarTopVertical.removeAttribute('style');
        navbarTop.remove(navbarTop);
        navbarDoubleTop.remove(navbarDoubleTop);
        navbarTopCombo.remove(navbarTopCombo);
      }