var catStatus = 'close';
function handlePhotoCategories(){
  if (document.getElementById('navigation')){
    if (catStatus == 'close' || catStatus == ''){
        document.getElementById('navigation').style.display = 'block';
        catStatus = 'open'
    } else {
          document.getElementById('navigation').style.display = 'none';
          catStatus = 'close'
    }
  }
  
}