/* Show or hide span and change the arrow */
function showHideSpan(id) {
  if(document.getElementById('faq'+id).style.display=='block') {
    document.getElementById('faq'+id).style.display='none';
    document.getElementById('selectedQuestionFaq'+id).style.display='none';
    document.getElementById('questionFaq'+id).style.display='block';
  } else {
    document.getElementById('faq'+id).style.display='block';
    document.getElementById('selectedQuestionFaq'+id).style.display='block';
    document.getElementById('questionFaq'+id).style.display='none';
  }
}