function showLeftSubmenu() {
  var currentPath;

  currentPath = location.pathname.replace('/preview', '')
  currentPath = currentPath.replace(/^\/[a-z]+\//, '')
  currentPath = currentPath.replace(/[^\/]*$/, '');
  currentPath = currentPath.replace(/\//g, '_');

  var el = document.getElementById('submenu_' + currentPath);
  while (currentPath.search(/\d+_$/) != -1) {
    var elID = 'submenu_' + currentPath;
    el = document.getElementById(elID);

/*    alert(elID + ': ');
    alert(el);*/

    if (el) {
      el.style.display = 'inline';
    }
    currentPath = currentPath.replace(/\d+_$/, '');
  }
}