text: let BWbox = document.querySelector('#BWBox');
  
  let navBG = document.querySelector('.bg-colour-bold');
  
  let introText = document.querySelector('#intro-para');
  
  let footerBG = document.querySelector('.myFooter');
  
  let footerRight = document.querySelectorAll('.right-side-footer a');
  
  var k;
  
  BWbox.addEventListener('click', function(){
      navBG.setAttribute('id','newNavBG');
      introText.setAttribute('id','newContentText');
      BWbox.setAttribute('id','newBWBox');
      footerBG.setAttribute('id','newFooterBG'); 
      for (k=0;k<footerRight.length;k++){
          footerRight[k].setAttribute('id','newFooterText');
          }
      }
  );