function showArticle(pre) {
  var article = document.getElementById(pre + 'Article');
  var moreLnk = document.getElementById(pre + 'More');
  article.style.display = 'block';
  article.style.visibility = 'visible';
  moreLnk.style.display = 'none';
  moreLnk.style.visibility = 'hidden';
}
function hideArticle(pre) {
    var article = document.getElementById(pre + 'Article');
    var moreLnk = document.getElementById(pre + 'More');
    article.style.display = 'none';
    article.style.visibility = 'hidden';
    moreLnk.style.display = 'inline';
    moreLnk.style.visibility = 'visible';
  }