var portal_type = "EncyclopediaPage";

function loadTree(view) {
  var req = getHTTPReq();
  if (!req) { alert('Giving up :( Cannot create an XMLHTTP instance'); return false;}

  var select_view = {"fen": 'showtree',  "southwide": 'showSWtree', 'other': 'showOtherTree', 'help': 'showHelp', "threats": 'showThreatstree'}; 

try {if (view) url = 'https://forestencyclopedia.net/p/p1/p1366/' + select_view[view];
else url = 'https://forestencyclopedia.net/p/p1/p1366/showtree';}
catch(e) {url = 'https://forestencyclopedia.net/v/' + view + '/getCustomNav'}
if (view) highlightSelectedView(view);
else highlightSelectedView('fen');

  statusChange('tree-wrapper', 'Loading Navigation Tree...');

  req.onreadystatechange = function() { displayLoadedTree(req); };

  show_col();
  req.open('GET', url, true);  req.send(null);
}

function displayLoadedTree(req) {
  if (req.readyState == 4) {
    if (req.status == 200) {
      document.getElementById('tree-wrapper').innerHTML = req.responseText;
      positionNavTree();
    } else { alert('There was a problem with the request.'+ req.status); }
  }
}