var arrowdown = 1;

function changeimage() {
  arrowdown = 1 - arrowdown ;
  if (arrowdown == 0) {
    document.getElementById("arrow").src = 'images/img_up.gif';
    document.getElementById("change_arrow").alt = 'Click for Danish Descriptions Only.';
    document.getElementById("change_arrow").title = 'Click for Danish Descriptions Only.';
    document.getElementById("arrow_description").innerHTML = 'Click for Danish Descriptions Only.'
    list('999');        
    }
  else {
    document.getElementById("arrow").src = 'images/img_down.gif';
    document.getElementById("change_arrow").alt = 'Click for Danish/English Descriptions.';
    document.getElementById("change_arrow").title = 'Click for Danish/English Descriptions.';
    document.getElementById("arrow_description").innerHTML = 'Click for Danish/English Descriptions.'
    list('0');        
    }
  }

function list(id) {
  if (id == '999') {
    for (var i = 1; i <= 10; i++) {
      if (document.getElementById('listsection'+i)) document.getElementById('listsection'+i).style.display='block';
      }
    if (document.getElementById('Expand')) {
      document.getElementById('Expand').className='listtitle';
      document.getElementById('Expand').title='';
      }
    }
  else if (id == '0') {
     for (var i = 1; i <= 10; i++) {
      if (document.getElementById('listsection'+i)) document.getElementById('listsection'+i).style.display='none';
      }
    }
  else {
    for (var i = 1; i <= 10; i++) {
      if (document.getElementById('listsection'+i)) document.getElementById('listsection'+i).style.display='none';
      }
    if (document.getElementById('listsection'+id)) document.getElementById('listsection'+id).style.display='block';
    if (document.getElementById('Expand')) {
      document.getElementById('Expand').className='listtitledown';
      document.getElementById('Expand').title='Expand All';
      }
    }
  }