function show(item) {
  var shown = document.getElementById('show-' + item); // sets the item to be shown/hidden
  var tohide = document.getElementById('info-' + item); // sets the place where the text will be changed
  if(shown.style.display == 'none') {
    shown.style.display = 'block';
    tohide.innerHTML = '(click to hide)';
    }
  else {
    shown.style.display = 'none';
    tohide.innerHTML = '(click to show)';
    }	  
  }