var bodyWrap = document.querySelector('body');
var bannerBox = document.querySelectorAll('.banner_wrap');
if(bannerBox.length > 0 ){
  bodyWrap.classList.add('bannerAddedNew');
  bodyWrap.classList.remove('noBannerAdded');
}
if(bannerBox.length == 0 ){
  bodyWrap.classList.add('noBannerAdded');
  bodyWrap.classList.remove('bannerAddedNew');
}